Cant log into MS Teams modern app. Authenticatin failed.

I have a user who is getting this error when trying to load MS Teams App. He has an Office 365 account but does not use ADFS.

The error is the same as is mentioned here but like I said he doesnt have ADFS in the organisation.

Any ideas how he can actually login in.
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Vasil Michev (MVP)Commented:
What error is that exactly? Get the actual logs as detailed here:

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roy_battyDirectorAuthor Commented:
Sorry this was a user error in the end. He was giving detail of an O365 account that didnt have access to TEAMS anyway!!

Thanks for you help anyway
roy_battyDirectorAuthor Commented:
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