Meeting attendees get stuck in the meeting lobby even though I have set the meeting options to all everyone to bypass lobby.

Question

Question: Problem Start Date
Answer: Fri, Oct 1, 2021, 12:00 AM GMT+8

Question: Subscription ID
Answer: benedict@X .com

Question: Browser Information
Answer: Microsoft Edge

Question: Error Message (if any)
Answer: AADSTS50020
trouble ammending meeting options when using app or in browser. It prompts saying 'Something went wrong , Reload the page or, if this keeps happening, try again later.'

Attendees continue to get stuck at the meeting lobby even if I physically go in to the meeting and change the meeting options to allow Everyone.

Question: Browser network trace or any other error message (if applicable)
Answer: NA

Customer answers to additional questions for Subscription management:
Problem Start Date - 2021-09-30T16:00:00.000Z;
Subscription ID - benedict@X .com;
Browser Information - Microsoft Edge;
Error Message (if any) - AADSTS50020
trouble ammending meeting options when using app or in browser. It prompts saying 'Something went wrong , Reload the page or, if this keeps happening, try again later.'

Attendees continue to get stuck at the meeting lobby even if I physically go in to the meeting and change the meeting options to allow Everyone.;
Browser network trace or any other error message (if applicable) - NA;

Customer has uploaded a file. /?workspaceid=1a4057ca-db26-40ac-bca2-71d096f548cd

• ProblemStartTime: 09/30/2021 16:00:00
• Cloud: Azure
• AzureProductSubscriptionID: No Subscription
• PUID: 0003400131A4F8D1
• Tenant Id: 9569a939-c006-4539-8686-f576dd384f43
• Object Id: b35bea32-6af2-42b0-9de8-da0dc2f2245c
• SubscriptionType: Free
• RequestTypeId: AZURE_SUBSCRIPTION_MANAGEMENT
• SupportPlanDisplayName: Basic support
• GrantPermission: False
• ShareMemoryDump: False
• HDInsightConsent: False
• DatabricksConsent: False

**Note: See External Reference in Admin Tab for full details.

Answer 1

We have a similar problem.
We are using a calendar with a shared mailbox to book Teams meetings in.

It has worked for many years and all of a sudden we had the same problem with people getting stuck in the lobby even though we changed the settings to "Everyone".

After some troubleshooting, we got it working again.

We have converted the shared mailbox to a regular mailbox and assigned a license.
Made a custom meeting policy to let everyone walk past the lobby and assigned the policy to the mailbox.
And after waiting for 24h it begin to work as intended to.

But why has this problem suddenly occured?