Unable to connect to SharePoint Online using claims in both source and target
説明
When using the claims option to connect to SharePoint Online you are unable to authorize in the target Microsoft 365 tenant. It tries to access with the source credentials when using claims.
原因
Credentials cached in Internet Explorer browser or Auto login enabled under the Internet Explorer settings.
対策
To clear Internet Explorer cache:
Open Internet Explorer, then go to Settings > Internet Options > General > Delete...
To disable Auto Login:
From your IE toolbar --> Tools --> Internet Options --> Security tab --> (you need to select every zone) --> Click Custom level --> Scroll all the way down and under User Authentication/Logon section --> Select prompt for username and password.