diff --git a/src/Fusion.Summary.Api/BaseController.cs b/src/Fusion.Summary.Api/BaseController.cs
index d24c23bce..e99ab82b1 100644
--- a/src/Fusion.Summary.Api/BaseController.cs
+++ b/src/Fusion.Summary.Api/BaseController.cs
@@ -7,9 +7,11 @@ namespace Fusion.Summary.Api;
 
 public class BaseController : ControllerBase
 {
-    // TODO: Transition to ProblemDetails
-    protected NotFoundObjectResult DepartmentNotFound(string sapDepartmentId) =>
-        NotFound(new { message = $"Department with id '{sapDepartmentId}' was not found" });
+    protected ActionResult DepartmentNotFound(string sapDepartmentId) =>
+        FusionApiError.NotFound(sapDepartmentId, $"Department with sap id '{sapDepartmentId}' was not found");
+
+    protected ActionResult SapDepartmentIdRequired() =>
+        FusionApiError.InvalidOperation("SapDepartmentIdRequired", "SapDepartmentId route parameter is required");
 
 
     protected Task DispatchAsync(IRequest command)
diff --git a/src/Fusion.Summary.Api/Controllers/DepartmentsController.cs b/src/Fusion.Summary.Api/Controllers/DepartmentsController.cs
index fc96419cc..7a55f1c2f 100644
--- a/src/Fusion.Summary.Api/Controllers/DepartmentsController.cs
+++ b/src/Fusion.Summary.Api/Controllers/DepartmentsController.cs
@@ -6,29 +6,22 @@
 using Fusion.Summary.Api.Controllers.Requests;
 using Fusion.Summary.Api.Domain.Commands;
 using Fusion.Summary.Api.Domain.Queries;
+using Microsoft.ApplicationInsights.AspNetCore.Extensions;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
+using HttpRequestExtensions = Microsoft.ApplicationInsights.AspNetCore.Extensions.HttpRequestExtensions;
 
 namespace Fusion.Summary.Api.Controllers;
 
-/// <summary>
-/// TODO: Add summary
-/// </summary>
 [ApiVersion("1.0")]
 [Authorize]
 [ApiController]
 public class DepartmentsController : BaseController
 {
-    /// <summary />
-    /// TODO: Add summary
-    /// <returns></returns>
     [HttpGet("departments")]
     [MapToApiVersion("1.0")]
-    [ProducesResponseType(typeof(ApiDepartment[]), StatusCodes.Status200OK)]
-    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
-    [ProducesResponseType(StatusCodes.Status403Forbidden)]
-    [ProducesResponseType(StatusCodes.Status404NotFound)]
-    public async Task<IActionResult> GetDepartmentsV1()
+    [ProducesResponseType(StatusCodes.Status200OK)]
+    public async Task<ActionResult<ApiDepartment[]>> GetDepartmentsV1()
     {
         #region Authorization
 
@@ -43,31 +36,19 @@ public async Task<IActionResult> GetDepartmentsV1()
 
         #endregion Authorization
 
-        var ret = new List<ApiDepartment>();
+        var departments = await DispatchAsync(new GetAllDepartments());
 
-        // Query
-        var departments = (await DispatchAsync(new GetAllDepartments())).ToArray();
-
-        if (departments.Length == 0)
-            return NotFound();
-        else
-        {
-            foreach (var d in departments) ret.Add(ApiDepartment.FromQueryDepartment(d));
-        }
+        var apiDepartments = departments.Select(ApiDepartment.FromQueryDepartment);
 
-        return Ok(ret);
+        return Ok(apiDepartments);
     }
 
-    /// <summary />
-    /// TODO: Add summary
-    /// <returns></returns>
     [HttpGet("departments/{sapDepartmentId}")]
     [MapToApiVersion("1.0")]
-    [ProducesResponseType(typeof(ApiDepartment), StatusCodes.Status200OK)]
-    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
-    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status400BadRequest)]
     [ProducesResponseType(StatusCodes.Status404NotFound)]
-    public async Task<IActionResult> GetDepartmentV1(string sapDepartmentId)
+    public async Task<ActionResult<ApiDepartment>> GetDepartmentV1(string sapDepartmentId)
     {
         #region Authorization
 
@@ -83,7 +64,7 @@ public async Task<IActionResult> GetDepartmentV1(string sapDepartmentId)
         #endregion Authorization
 
         if (string.IsNullOrWhiteSpace(sapDepartmentId))
-            return BadRequest("SapDepartmentId route parameter is required");
+            return SapDepartmentIdRequired();
 
         var department = await DispatchAsync(new GetDepartment(sapDepartmentId));
 
@@ -94,15 +75,12 @@ public async Task<IActionResult> GetDepartmentV1(string sapDepartmentId)
         return Ok(ApiDepartment.FromQueryDepartment(department));
     }
 
-    /// <summary />
-    /// TODO: Add summary
-    /// <returns></returns>
+
     [HttpPut("departments/{sapDepartmentId}")]
     [MapToApiVersion("1.0")]
-    [ProducesResponseType(StatusCodes.Status200OK)]
     [ProducesResponseType(StatusCodes.Status201Created)]
-    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
-    [ProducesResponseType(StatusCodes.Status403Forbidden)]
+    [ProducesResponseType(StatusCodes.Status204NoContent)]
+    [ProducesResponseType(StatusCodes.Status400BadRequest)]
     [ProducesResponseType(StatusCodes.Status404NotFound)]
     public async Task<IActionResult> PutV1(string sapDepartmentId, [FromBody] PutDepartmentRequest request)
     {
@@ -120,7 +98,7 @@ public async Task<IActionResult> PutV1(string sapDepartmentId, [FromBody] PutDep
         #endregion Authorization
 
         if (string.IsNullOrWhiteSpace(sapDepartmentId))
-            return BadRequest("SapDepartmentId route parameter is required");
+            return SapDepartmentIdRequired();
 
         var personIdentifiers = request.ResourceOwnersAzureUniqueId
             .Concat(request.DelegateResourceOwnersAzureUniqueId)
@@ -131,7 +109,7 @@ public async Task<IActionResult> PutV1(string sapDepartmentId, [FromBody] PutDep
             .ToList();
 
         if (unresolvedProfiles.Count != 0)
-            return BadRequest($"Profiles: {string.Join(',', unresolvedProfiles)} could not be resolved");
+            return FusionApiError.NotFound(string.Join(',', unresolvedProfiles), "Profiles could not be resolved");
 
 
         var department = await DispatchAsync(new GetDepartment(sapDepartmentId));
@@ -146,7 +124,7 @@ await DispatchAsync(
                     request.ResourceOwnersAzureUniqueId,
                     request.DelegateResourceOwnersAzureUniqueId));
 
-            return Created();
+            return Created(Request.GetUri(), null);
         }
 
         // Check if department owners has changed
@@ -160,10 +138,10 @@ await DispatchAsync(
                     request.ResourceOwnersAzureUniqueId,
                     request.DelegateResourceOwnersAzureUniqueId));
 
-            return Ok();
+            return NoContent();
         }
 
         // No change
-        return Ok();
+        return NoContent();
     }
 }
\ No newline at end of file
diff --git a/src/Fusion.Summary.Api/Controllers/SummaryReportsController.cs b/src/Fusion.Summary.Api/Controllers/SummaryReportsController.cs
index ea3d866d2..625cac547 100644
--- a/src/Fusion.Summary.Api/Controllers/SummaryReportsController.cs
+++ b/src/Fusion.Summary.Api/Controllers/SummaryReportsController.cs
@@ -1,4 +1,5 @@
 using System.Net.Mime;
+using Fusion.AspNetCore.Api;
 using Fusion.AspNetCore.FluentAuthorization;
 using Fusion.AspNetCore.OData;
 using Fusion.Authorization;
@@ -7,6 +8,7 @@
 using Fusion.Summary.Api.Controllers.Requests;
 using Fusion.Summary.Api.Domain.Commands;
 using Fusion.Summary.Api.Domain.Queries;
+using Microsoft.ApplicationInsights.AspNetCore.Extensions;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 
@@ -18,14 +20,13 @@ namespace Fusion.Summary.Api.Controllers;
 public class SummaryReportsController : BaseController
 {
     [HttpGet("resource-owners-summary-reports/{sapDepartmentId}/weekly")]
-    [Produces(MediaTypeNames.Application.Json)]
+    [MapToApiVersion("1.0")]
     [ProducesResponseType(StatusCodes.Status200OK)]
-    [ProducesResponseType(typeof(ProblemDetails), StatusCodes.Status400BadRequest)]
-    [ProducesResponseType(typeof(ProblemDetails), StatusCodes.Status404NotFound)]
+    [ProducesResponseType(StatusCodes.Status400BadRequest)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
     [ODataFilter(nameof(ApiWeeklySummaryReport.Period))]
     [ODataOrderBy(nameof(ApiWeeklySummaryReport.Period), nameof(ApiWeeklySummaryReport.Id))]
     [ODataTop(100), ODataSkip]
-    [ApiVersion("1.0")]
     public async Task<ActionResult<ApiCollection<ApiWeeklySummaryReport>>> GetWeeklySummaryReportsV1(
         [FromRoute] string sapDepartmentId, ODataQueryParams query)
     {
@@ -44,7 +45,7 @@ await Request.RequireAuthorizationAsync(r =>
         #endregion
 
         if (string.IsNullOrWhiteSpace(sapDepartmentId))
-            return BadRequest("SapDepartmentId route parameter is required");
+            return SapDepartmentIdRequired();
 
         if (await DispatchAsync(new GetDepartment(sapDepartmentId)) is null)
             return DepartmentNotFound(sapDepartmentId);
@@ -55,12 +56,16 @@ await Request.RequireAuthorizationAsync(r =>
             .FromQueryCollection(queryReports, ApiWeeklySummaryReport.FromQuerySummaryReport));
     }
 
+    /// <summary>
+    ///     Summary report key is composed of the department sap id and the period date.
+    ///     If a report already exists for the given period, it will be replaced.
+    /// </summary>
     [HttpPut("resource-owners-summary-reports/{sapDepartmentId}/weekly")]
-    [Produces(MediaTypeNames.Application.Json)]
+    [MapToApiVersion("1.0")]
+    [ProducesResponseType(StatusCodes.Status201Created)]
     [ProducesResponseType(StatusCodes.Status204NoContent)]
-    [ProducesResponseType(typeof(ProblemDetails), StatusCodes.Status400BadRequest)]
-    [ProducesResponseType(typeof(ProblemDetails), StatusCodes.Status404NotFound)]
-    [ApiVersion("1.0")]
+    [ProducesResponseType(StatusCodes.Status400BadRequest)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
     public async Task<IActionResult> PutWeeklySummaryReportV1([FromRoute] string sapDepartmentId,
         [FromBody] PutWeeklySummaryReportRequest request)
     {
@@ -79,18 +84,18 @@ await Request.RequireAuthorizationAsync(r =>
         #endregion
 
         if (string.IsNullOrWhiteSpace(sapDepartmentId))
-            return BadRequest("SapDepartmentId route parameter is required");
+            return SapDepartmentIdRequired();
 
         if (await DispatchAsync(new GetDepartment(sapDepartmentId)) is null)
             return DepartmentNotFound(sapDepartmentId);
 
         if (request.Period.DayOfWeek != DayOfWeek.Monday)
-            return BadRequest("Period date must be the first day of the week");
+            return FusionApiError.InvalidOperation("InvalidPeriod", "Weekly summary report period date must be a monday");
 
         var command = new PutWeeklySummaryReport(sapDepartmentId, request);
 
-        await DispatchAsync(command);
+        var newReportCreated = await DispatchAsync(command);
 
-        return NoContent();
+        return newReportCreated ? Created(Request.GetUri(), null) : NoContent();
     }
 }
\ No newline at end of file
diff --git a/src/Fusion.Summary.Api/Domain/Commands/PutWeeklySummaryReport.cs b/src/Fusion.Summary.Api/Domain/Commands/PutWeeklySummaryReport.cs
index 4ab6df297..116d6c11d 100644
--- a/src/Fusion.Summary.Api/Domain/Commands/PutWeeklySummaryReport.cs
+++ b/src/Fusion.Summary.Api/Domain/Commands/PutWeeklySummaryReport.cs
@@ -6,7 +6,7 @@
 
 namespace Fusion.Summary.Api.Domain.Commands;
 
-public class PutWeeklySummaryReport : IRequest
+public class PutWeeklySummaryReport : IRequest<bool>
 {
     public string SapDepartmentId { get; private set; }
 
@@ -20,7 +20,7 @@ public PutWeeklySummaryReport(string sapDepartmentId, PutWeeklySummaryReportRequ
     }
 
 
-    public class Handler : IRequestHandler<PutWeeklySummaryReport>
+    public class Handler : IRequestHandler<PutWeeklySummaryReport, bool>
     {
         private readonly SummaryDbContext _dbContext;
 
@@ -29,7 +29,7 @@ public Handler(SummaryDbContext dbContext)
             _dbContext = dbContext;
         }
 
-        public async Task Handle(PutWeeklySummaryReport request, CancellationToken cancellationToken)
+        public async Task<bool> Handle(PutWeeklySummaryReport request, CancellationToken cancellationToken)
         {
             if (!await _dbContext.Departments.AnyAsync(d => d.DepartmentSapId == request.SapDepartmentId,
                     cancellationToken: cancellationToken))
@@ -83,6 +83,9 @@ public async Task Handle(PutWeeklySummaryReport request, CancellationToken cance
             _dbContext.WeeklySummaryReports.Add(dbSummaryReport);
 
             await _dbContext.SaveChangesAsync(cancellationToken);
+
+            // return true if a new report was created
+            return existingReport is null;
         }
     }
 }
\ No newline at end of file
diff --git a/src/Fusion.Summary.Functions/Deployment/disabled-functions.json b/src/Fusion.Summary.Functions/Deployment/disabled-functions.json
index 7aeeda537..3c70da8da 100644
--- a/src/Fusion.Summary.Functions/Deployment/disabled-functions.json
+++ b/src/Fusion.Summary.Functions/Deployment/disabled-functions.json
@@ -1,10 +1,6 @@
 [
   {
     "environment": "pr",
-    "disabledFunctions": [
-      "weekly-department-recipients-sync",
-      "weekly-department-summary-sender",
-      "weekly-department-summary-worker"
-    ]
+    "disabledFunctions": []
   }
 ]
diff --git a/src/Fusion.Summary.Functions/Functions/WeeklyDepartmentSummarySender.cs b/src/Fusion.Summary.Functions/Functions/WeeklyDepartmentSummarySender.cs
index ee20bbea6..b97d76f9e 100644
--- a/src/Fusion.Summary.Functions/Functions/WeeklyDepartmentSummarySender.cs
+++ b/src/Fusion.Summary.Functions/Functions/WeeklyDepartmentSummarySender.cs
@@ -35,7 +35,7 @@ public WeeklyDepartmentSummarySender(ISummaryApiClient summaryApiClient, INotifi
     }
 
     [FunctionName("weekly-department-summary-sender")]
-    public async Task RunAsync([TimerTrigger("0 0 5 * * 1", RunOnStartup = false)] TimerInfo timerInfo)
+    public async Task RunAsync([TimerTrigger("0 0 5 * * MON", RunOnStartup = false)] TimerInfo timerInfo)
     {
         var departments = await summaryApiClient.GetDepartmentsAsync();
 
diff --git a/src/tests/Fusion.Summary.Api.Tests/IntegrationTests/SummaryReportTests.cs b/src/tests/Fusion.Summary.Api.Tests/IntegrationTests/SummaryReportTests.cs
index 69f5b3c66..6d9c60c53 100644
--- a/src/tests/Fusion.Summary.Api.Tests/IntegrationTests/SummaryReportTests.cs
+++ b/src/tests/Fusion.Summary.Api.Tests/IntegrationTests/SummaryReportTests.cs
@@ -42,11 +42,44 @@ public async Task PutAndGetWeeklySummaryReport_ShouldReturnReport()
 
 
         var response = await _client.PutWeeklySummaryReportAsync(department.DepartmentSapId);
-        response.Should().BeNoContent();
+        response.Should().BeCreated();
 
         var getResponse = await _client.GetWeeklySummaryReportsAsync(department.DepartmentSapId);
         getResponse.Should().BeSuccessfull();
         getResponse.Value!.Items.Should().HaveCount(1);
     }
 
+    [Fact]
+    public async Task PutAndUpdateWeeklySummaryReport_ShouldReturnNoContent()
+    {
+        using var adminScope = _fixture.AdminScope();
+        var testUser = _fixture.Fusion.CreateUser().AsEmployee().AzureUniqueId!.Value;
+
+        var department = await _client.PutDepartmentAsync(testUser);
+
+        var response = await _client.PutWeeklySummaryReportAsync(department.DepartmentSapId);
+        response.Should().BeCreated();
+
+        response = await _client.PutWeeklySummaryReportAsync(department.DepartmentSapId);
+        response.Should().BeNoContent();
+    }
+
+    [Fact]
+    public async Task PutWeeklySummaryReport_WithInvalidPeriodDate_ShouldReturnBadRequest()
+    {
+        using var adminScope = _fixture.AdminScope();
+        var testUser = _fixture.Fusion.CreateUser().AsEmployee().AzureUniqueId!.Value;
+
+        var department = await _client.PutDepartmentAsync(testUser);
+
+        var response = await _client.PutWeeklySummaryReportAsync(department.DepartmentSapId, (report) =>
+        {
+            var nowDate = DateTime.UtcNow;
+            if (nowDate.DayOfWeek == DayOfWeek.Monday)
+                report.Period = nowDate.AddDays(1);
+            report.Period = nowDate;
+        });
+
+        response.Should().BeBadRequest();
+    }
 }
\ No newline at end of file