Hola,
im doing D365 CE t2t migration one of my clients, but now i faced tricky problem when creating user mapping file for sandbox. Problem: currently same time we are doing O365 t2t activities and source tenant upn domain @xxx.com has not been moved yet to destionation tenant, so can i use eg. @xxxx.onmicrosoft.com what is destination tenant default upn or should i wait that @xxx.com address is successfully moved to tenant and then use that to create mapping file?
thanks
Hey Purtsi.
If you're doing a tenant to Tenant, that mapping file is important. However, it doesn't have to be with your custom domain (@xxx.com) You can use the @xxx.onmicrosoft.com as long as the value exists.
Best regards
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