what happened to access to the viva engage community page

Question

what happened to access to the viva engage community page

Anna Khuchua 0

I had access to different groups on viva engage and now I am not able to sign in? what happened?

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Announcement Posted in Dynamics 365 Unified Pricing Management

Wendy Muar 0 Reputation points

2026-09-29T17:02:10.78+00:00

The same for me, I can no longer access Viva Engage groups. I still get the emails with a link, but when I click is says I am not in the Microsoft Tenant. Here is the erorr: Selected user account does not exist in tenant 'Microsoft' and cannot access the application 'c1c74fed-04c9-4704-80dc-9f79a2e515cb' in that tenant. The account needs to be added as an external user in the tenant first. Please use a different account.

2 answers

Your answer

Wendy Muar 0 Reputation points

2026-09-29T17:02:10.78+00:00

The same for me, I can no longer access Viva Engage groups. I still get the emails with a link, but when I click is says I am not in the Microsoft Tenant. Here is the erorr: Selected user account does not exist in tenant 'Microsoft' and cannot access the application 'c1c74fed-04c9-4704-80dc-9f79a2e515cb' in that tenant. The account needs to be added as an external user in the tenant first. Please use a different account.

Answer 1

Killian N 4,490 Independent Advisor

Hi Anna,

To help me better understand the situation, could you please let me know whether you're unable to sign in to Viva Engage at all, or if you're able to sign in but can no longer access certain communities?

In addition, if possible, could you share the exact error message you're receiving, or a screenshot of what you see when attempting to access the community? This information would help me get a clearer picture of the issue and offer more relevant guidance.

I look forward to your reply.

Kind regards,

Anna Khuchua 0 Reputation points

2026-09-21T14:47:12.3266667+00:00

Sorry, but we’re having trouble signing you in.

AADSTS50020: User account '[Moderator note: Personally Identifiable Information removed] @gmail.com' from identity provider 'live.com' does not exist in tenant 'Microsoft' and cannot access the application 'c1c74fed-04c9-4704-80dc-9f79a2e515cb'(Yammer Web) in that tenant. The account needs to be added as an external user in the tenant first. Sign out and sign in again with a different Azure Active Directory user account.
Killian N 4,490 Reputation points Independent Advisor

2026-09-21T14:51:36.13+00:00

Hi Anna,

Thank you for providing the error message. The AADSTS50020 error indicates that the Gmail account you are currently using is not recognized as a user in the Microsoft tenant hosting that Viva Engage community.

Since you previously had access, could you please confirm whether you are signing in with the same account you used when you originally accessed these communities? If so, was this account provided access as an external/guest user?
Anna Khuchua 0 Reputation points

2026-09-21T14:55:39.9533333+00:00

https://forms.cloud.microsoft/pages/responsepage.aspx?id=v4j5cvGGr0GRqy180BHbR9LUjsllSb5PooVobHrJTqtUNTRWOUQwNUs3Vjg4TzgwRzNPUkQ5OFVBNS4u&route=shorturl I used this form to register and I signed up with my personal email. [Moderator note: Personally Identifiable Information removed] @gmail.com
Anna Khuchua 0 Reputation points

2026-09-21T15:00:15.4633333+00:00

here is a screen from my inbox where I post a question in the community page. THat is really weird that my account has been removed from there.
Killian N 4,490 Reputation points Independent Advisor

2026-09-21T15:13:49.6966667+00:00

Hi Anna,

Thank you for the screenshot. I understand why this seems unusual, especially since the email clearly shows that you previously posted and received replies in the Viva Engage community.

The screenshot confirms your previous participation, while the current AADSTS50020 message means that your Gmail account is no longer being recognized as an authorized guest in the tenant hosting the community. Microsoft documents that access for external Viva Engage users depends on the account remaining available through the Microsoft Entra B2B guest framework.

Unfortunately, this is not something that can be restored from your side. Please contact the community owner or the team that sent you the registration form and ask them to verify your guest account using the same Gmail address. They can support you in determining what changed and, if needed, send you a new invitation.

Kind regards,

Answer 2

Common causes are:

The sign-in path changed. Viva Engage sign-in for Microsoft Entra ID users goes through https://engage.cloud.microsoft or the Microsoft 365 portal at https://www.office.com/. If access is attempted through https://www.yammer.com, that URL is for external networks only. If https://web.yammer.com is used, it redirects to https://engage.cloud.microsoft and requires Microsoft Entra ID credentials.
Browser session confusion across tenants. If there are multiple Viva Engage accounts or tenants, an existing browser session can keep the wrong identity signed in. Close all browser windows and reopen them before switching tenants. If access to multiple tenants is needed at the same time, use a different browser or an InPrivate/Incognito window for each tenant.
Tenant/account mapping issues. If sign-in goes to the wrong tenant, or a different account appears under the same name and the original account shows as Former member, that is a configuration issue that must be resolved by the Viva Engage tenant admin.
If the groups were external networks, access behavior is different. External users without a Microsoft Entra ID account can still use the external sign-in option on https://engage.cloud.microsoft. Access through https://www.yammer.com continues only for the external network experience.

Practical checks:

Try signing in from https://engage.cloud.microsoft.
If available, try from https://www.office.com/ and open Viva Engage there.
Close all browser windows first, then retry.
If multiple company/community accounts exist, use a separate browser or InPrivate/Incognito session.
If sign-in lands in the wrong tenant or the old account is no longer tied to the messages/groups, contact the Viva Engage tenant admin.