I have a user account where the user wanted to fully remove their mailbox and get a new one. I disabled the mailbox from EX2013, then deleted it, afterwards i created a new mailbox for the user and everything is as he wanted it, however his LegacyExchangeDN doesn't match the global address book X500 address
the users LegacyExchangeDN is
/o=ORG/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=7e474ce46d4045df808fe747bb68e2da-First Last
the GLA has the entry as
/o=ORG/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=flast@ORG.com
I configured the mailbox X500 address as
/o=ORG/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=flast@ORG.com
when i type in the employees name into outlook and press CTRL+K (or when selecting the user from the GLA) it NDRs the following
IMCEAEX-_o=ORG_ou=Exchange+20Administrative+20Group+20+28FYDIBOHF23SPDLT+29_cn=Recipients_cn=flast@ORG.com Remote Server returned '550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found'
Now as i understand it the X500 address should catch the delta in the LegacyDN and deliver the email to the mailbox however every single time it just NDRs