After a user has been migrated, the address to the newly migrated user, is wrong when sending mail from Outlook: Diagnostic information for administrators: Generating server: Serverame.domain.tld IMCEAEX-_o=ExchangeDomain_ou=Exchange+20Administrative+20Group+20+28FYDIBOHF23SPDLT+29_cn=Recipients_cn=GUID41-Firstname+20Surname@domain.tld Remote Server returned '550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found'
In order to add in or correct the LegacyExchDN for this user or many users see the following External links
1) To find the LegacyExchDN for many users, use the following URL
2) To use a NDR to find the LegacyExchDN use the following URL:
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