Although there's a similar question on SO, but it didn't resolve my issue.
I created a project in Azure DevOps with my Microsoft365 account (work account name@company.com). Then I invited my client to that project (name2@company2.com). It worked initially but now it's throwing Error 401. Not authorized to view this page.
When she logins on Project URL, it makes her login 2 times which is strange. I tried incognito, clearing cache, removing cookies, different browsers, everything.
She got a mail initially when I invited but now I removed her from project and invited again, but no invitation email is going to her email again.
More info: She has added our work emails on her Microsoft 365 Teams, SharePoint with her work email.
What can be the issue? Any tips to resolve?