Forum Discussion

Brass Contributor

Mar 01, 2021

Solved

Unified GAL with AADConnect

Hi, My customer wants to merge bikes.com" into cars.com's existing hybrid-configured and federated tenant by adding bikes.com email domain to the existing tenant and create a unified GAL as cars.c...

VasilMichev
Mar 03, 2021
They will not, as they'll be getting the on-premises GAL.

DouglasHamilton

Brass Contributor

Mar 03, 2021

VasilMichev, thanks for your reply.

Could you please clarify "move users to a single tenant"?

The suggested solution is a single O365 tenant with two domains (cars.com and bikes.com) as bikes.com will keep its domain. Cars.com is already configured as an Exchange hybrid and now they want to merge bikes.com into the already existing tenant.

To get a unified GAL, will an AADConnect write-back sync suffice or does bikes.com also need to be an Exchange hybrid?

Thanks, Douglas

VasilMichev

MVP

Mar 03, 2021

Writeback doesnt cover recipient objects, so objects created directly in O365 will not be visible on-premises. The only way to see all recipients across both domains will be when using an O365 account and only if both domains are in a single tenant. Or you can use third-part "galsync" products to create matching entries on-premises. PowerShell is also an option, if you feel up to it.

DouglasHamilton
Brass Contributor
Mar 03, 2021
OK, but both domains (forests) will join the same tenant ("cars.com" already is with a majority of their mailboxes in EOL) and optionally "bikes.com" will be configured as a hybrid. Without a 3rd party tool, will on-prem users from each forest not be able to see users from the other forest in GAL?
- VasilMichev
  MVP
  Mar 03, 2021
  They will not, as they'll be getting the on-premises GAL.
  - DouglasHamilton
    Brass Contributor
    Mar 10, 2021
    Thank you Vasil for your input.
    
    /Douglas