Office 365 Federation ID Configuration Notes

Thought it would make sense to share with the community the information I have discovered to help with configuring O365 federated login accounts and troubleshooting guidance for federated IDs:

Support for Multiple Top Level Domains:

Error when you try to configure a second federated domain in Office 365: “Federation service identifier specified in the AD FS 2.0 server is already in use.” ¬†

Changes are not synchronized to Office 365 after you update the UPN of an on-premises user account to use a different SSO-enabled domain suffix  

 Troubleshooting dirsync and UPN

The LsaLookupSids function may return the old user name instead of the new user name if the user name has changed

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