Cannot access Yammer

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Posted on by HM-30100754-0

Hey,

I cannot access yammer last couple of days. The error is "AADSTS900023: Specified tenant identifier 'dynamicsnavdev' is neither a valid DNS name, nor a valid external domain."

is it down or moved?

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Dynamics 365 Business Central

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OussamaSabbouh 12,973 Super User 2026 Season 1 on at

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Hello,

Yammer has been replaced by Microsoft Viva Engage.
The old dynamicsnavdev Yammer tenant was retired.
You can now access the Business Central partner community through Viva Engage at https://engage.cloud.microsoft

Regards,
Oussama

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Patnor 9 on at

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I cannot access the community on https://engage.cloud.microsoft only our internal and other communities, do yiku have any further details?

Regards

Patrik

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Sumit Singh 11,757 Super User 2026 Season 1 on at

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Hi,

Similar thread:-

Unable to access https://aka.ms/BCYammer

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