by In a recent project, we needed to updated members of an existing Office 365 group using Microsoft Graph Client CSOM. Previously in a blog here, I have listed a way to add members using Office 365 PnP CSOM (UnifiedGroupUtility) but there is an ongoing issue with it in the recent releases . So in the meantime while that issue is fixed, we could use the below method to update owners or members in O365 groups.
Steps:
- Create a Graph app. The steps for doing that is listed in this blog.
- Get the Authentication token of the App
- Get the list of owner emails and add them to a list array
- Call the Graph Client to authenticate using the authentication token
- Traverse the owners emails array and validate the user using the Graph users collection
- Add the user to the members and owners of the Office 365 group
Note: For Office 365 group owners, the users should be a part of the members and the owners groups.
Below is the code snippet for the same.
Happy Coding !!!
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| using OfficeDevPnP.Core.Framework.Graph; | |
| using Microsoft.Graph; | |
| using Microsoft.SharePoint.Client; | |
| using Microsoft.IdentityModel.Clients.ActiveDirectory; | |
| var authenticationContext = new AuthenticationContext(authString, false); | |
| // Config for OAuth client credentials | |
| ClientCredential clientCred = new ClientCredential(clientId, clientSecret); | |
| AuthenticationResult authenticationResult = null; | |
| string token = ""; | |
| Task authtask = Task.Run(async () => authenticationResult = await authenticationContext.AcquireTokenAsync(resourceId, clientCred)); | |
| authtask.Wait(); | |
| //List of Owner Emails | |
| List<string> Owners = new List<string>(); | |
| if (authenticationResult != null) | |
| { | |
| token = authenticationResult.AccessToken; | |
| var group = UnifiedGroupsUtility.ListUnifiedGroups(token, mailNickname: alias).Where(result => result.MailNickname.ToLower().Equals(alias.ToLower())).First(); | |
| if (group != null) | |
| { | |
| string groupId = group.GroupId; | |
| if (Owners.Count > 0) | |
| try | |
| { | |
| Task runTask = Task.Run(async() => await updateGroupOwner(token, groupId, assetOwners)); | |
| runTask.Wait(); | |
| } | |
| catch(Exception ex) | |
| { | |
| log.Info("Exception while adding owners " + ex.Message); | |
| } | |
| } | |
| } | |
| private async Task updateGroupOwner(string token, string groupId, List<string> assetOwners) | |
| { | |
| GraphServiceClient graphClient = new GraphServiceClient(new DelegateAuthenticationProvider( | |
| async (requestMessage) => | |
| { | |
| if (!String.IsNullOrEmpty(token)) | |
| { | |
| // Configure the HTTP bearer Authorization Header | |
| requestMessage.Headers.Authorization = new AuthenticationHeaderValue("bearer", token); | |
| } | |
| }), new PnPHttpProvider(10, 500)); | |
| var groupToUpdate = await graphClient.Groups[groupId].Request().GetAsync(); | |
| foreach (var o in Owners) | |
| { | |
| var ownerQuery = await graphClient.Users | |
| .Request() | |
| .Filter($"userPrincipalName eq '{o}'") | |
| .GetAsync(); | |
| var owner = ownerQuery.FirstOrDefault(); | |
| if (owner != null) | |
| { | |
| try | |
| { | |
| // And if any, add it to the collection of group's owners and members | |
| await graphClient.Groups[groupToUpdate.Id].Members.References.Request().AddAsync(owner); | |
| await graphClient.Groups[groupToUpdate.Id].Owners.References.Request().AddAsync(owner); | |
| } | |
| catch (ServiceException ex) | |
| { | |
| if (ex.Error.Code == "Request_BadRequest" && | |
| ex.Error.Message.Contains("added object references already exist")) | |
| { | |
| // Skip any already existing owner | |
| } | |
| else | |
| { | |
| throw ex; | |
| } | |
| } | |
| } | |
| } | |
| } | |
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