OneDrive for Business can't sync after tenant migration
After a tenant-to-tenant migration, a User Principal Name (UPN) change, or a password update, OneDrive for Business might be unable to sync.
To resolve this issue, clear the cached credentials for OneDrive for Business using the following steps:
Sign out of OneDrive for Business.
Remove the following folders:
%localappdata%/Microsoft/OneAuth
%localappdata%/Microsoft/IdentityCache
Sign in to OneDrive for Business.
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