diff --git a/services/static-webserver/client/source/class/osparc/dashboard/CardBase.js b/services/static-webserver/client/source/class/osparc/dashboard/CardBase.js
index 8b466d0608b..b6b6b029203 100644
--- a/services/static-webserver/client/source/class/osparc/dashboard/CardBase.js
+++ b/services/static-webserver/client/source/class/osparc/dashboard/CardBase.js
@@ -148,54 +148,56 @@ qx.Class.define("osparc.dashboard.CardBase", {
       return false;
     },
 
-    // groups -> [orgMembs, orgs, [productEveryone], [everyone]];
-    setIconAndTooltip: function(shareIcon, accessRights, groups) {
-      shareIcon.setSource(osparc.dashboard.CardBase.SHARE_ICON);
-      if (osparc.data.model.Study.canIWrite(accessRights)) {
-        shareIcon.set({
-          toolTipText: qx.locale.Manager.tr("Share")
-        });
+    populateShareIcon: async function(shareIcon, accessRights) {
+      const gids = Object.keys(accessRights).map(key => parseInt(key));
+
+      const groupsStore = osparc.store.Groups.getInstance();
+
+      // Icon
+      const groupEveryone = groupsStore.getEveryoneGroup();
+      const groupProductEveryone = groupsStore.getEveryoneProductGroup();
+      const organizations = groupsStore.getOrganizations();
+      const organizationIds = Object.keys(organizations).map(key => parseInt(key));
+      if (gids.includes(groupEveryone.getGroupId()) || gids.includes(groupProductEveryone.getGroupId())) {
+        shareIcon.setSource(osparc.dashboard.CardBase.SHARED_ALL);
+      } else if (organizationIds.filter(value => gids.includes(value)).length) { // find intersection
+        shareIcon.setSource(osparc.dashboard.CardBase.SHARED_ORGS);
+      } else if (gids.length === 1) {
+        shareIcon.setSource(osparc.dashboard.CardBase.SHARE_ICON);
+      } else {
+        shareIcon.setSource(osparc.dashboard.CardBase.SHARED_USER);
       }
-      let sharedGrps = [];
-      const myGroupId = osparc.auth.Data.getInstance().getGroupId();
-      for (let i=0; i<groups.length; i++) {
-        if (groups[i].length === 0) {
-          // user has no read access to the productEveryone
-          continue;
+
+      // Tooltip
+      const sharedGrps = [];
+      const groups = [];
+      groups.push(groupEveryone);
+      groups.push(groupProductEveryone);
+      groups.push(...Object.values(organizations));
+      groups.forEach(group => {
+        const idx = gids.indexOf(group.getGroupId());
+        if (idx > -1) {
+          sharedGrps.push(group);
+          gids.splice(idx, 1);
         }
-        const sharedGrp = [];
-        const gids = Object.keys(accessRights);
-        for (let j=0; j<gids.length; j++) {
-          const gid = parseInt(gids[j]);
-          if (gid === myGroupId) {
-            continue;
-          }
-          const grp = groups[i].find(group => group.getGroupId() === gid);
-          if (grp) {
-            sharedGrp.push(grp);
+      });
+      // once the groups were removed, the remaining group ids are users' primary groups ids
+      const usersStore = osparc.store.Users.getInstance();
+      const myGroupId = osparc.auth.Data.getInstance().getGroupId();
+      for (let i=0; i<gids.length; i++) {
+        const gid = gids[i];
+        if (myGroupId !== gid) {
+          const user = await usersStore.getUser(gid);
+          if (user) {
+            sharedGrps.push(user);
           }
         }
-        if (sharedGrp.length === 0) {
-          continue;
-        } else {
-          sharedGrps = sharedGrps.concat(sharedGrp);
-        }
-        switch (i) {
-          case 0:
-            shareIcon.setSource(osparc.dashboard.CardBase.SHARED_USER);
-            break;
-          case 1:
-            shareIcon.setSource(osparc.dashboard.CardBase.SHARED_ORGS);
-            break;
-          case 2:
-          case 3:
-            shareIcon.setSource(osparc.dashboard.CardBase.SHARED_ALL);
-            break;
-        }
       }
 
-      // tooltip
-      if (sharedGrps.length === 0) {
+      if (sharedGrps.length === 0 && osparc.data.model.Study.canIWrite(accessRights)) {
+        shareIcon.set({
+          toolTipText: qx.locale.Manager.tr("Share")
+        });
         return;
       }
       const sharedGrpLabels = [];
@@ -215,18 +217,6 @@ qx.Class.define("osparc.dashboard.CardBase", {
       shareIcon.addListener("mouseover", () => hint.show(), this);
       shareIcon.addListener("mouseout", () => hint.exclude(), this);
     },
-
-    // groups -> [users, orgs, [productEveryone], [everyone]];
-    populateShareIcon: function(shareIcon, accessRights) {
-      const groupsStore = osparc.store.Groups.getInstance();
-      const usersStore = osparc.store.Users.getInstance();
-      const users = usersStore.getUsers();
-      const orgs = Object.values(groupsStore.getOrganizations());
-      const productEveryone = [groupsStore.getEveryoneProductGroup()];
-      const everyone = [groupsStore.getEveryoneGroup()];
-      const groups = [users, orgs, productEveryone, everyone];
-      osparc.dashboard.CardBase.setIconAndTooltip(shareIcon, accessRights, groups);
-    },
   },
 
   properties: {
diff --git a/services/static-webserver/client/source/class/osparc/data/Resources.js b/services/static-webserver/client/source/class/osparc/data/Resources.js
index 4466c23099a..bc9068bca8c 100644
--- a/services/static-webserver/client/source/class/osparc/data/Resources.js
+++ b/services/static-webserver/client/source/class/osparc/data/Resources.js
@@ -884,6 +884,10 @@ qx.Class.define("osparc.data.Resources", {
       "users": {
         useCache: false, // osparc.store.Groups handles the cache
         endpoints: {
+          get: {
+            method: "GET",
+            url: statics.API + "/groups/{gid}/users"
+          },
           search: {
             method: "POST",
             url: statics.API + "/users:search"
diff --git a/services/static-webserver/client/source/class/osparc/store/Users.js b/services/static-webserver/client/source/class/osparc/store/Users.js
index 652eaf68b79..59da1a2fb9a 100644
--- a/services/static-webserver/client/source/class/osparc/store/Users.js
+++ b/services/static-webserver/client/source/class/osparc/store/Users.js
@@ -28,6 +28,29 @@ qx.Class.define("osparc.store.Users", {
   },
 
   members: {
+    fetchUser: function(groupId) {
+      const params = {
+        url: {
+          gid: groupId
+        }
+      };
+      return osparc.data.Resources.fetch("users", "get", params)
+        .then(userData => {
+          const user = this.addUser(userData[0]);
+          return user;
+        });
+    },
+
+    getUser: function(groupId, fetchIfNotFound = true) {
+      const userFound = this.getUsers().find(user => user.getGroupId() === groupId);
+      if (userFound) {
+        return new Promise(resolve => resolve(userFound));
+      } else if (fetchIfNotFound) {
+        return this.fetchUser(groupId);
+      }
+      return new Promise(reject => reject());
+    },
+
     addUser: function(userData) {
       const user = new osparc.data.model.User(userData);
       const userFound = this.getUsers().find(usr => usr.getGroupId() === user.getGroupId());