Questions on Multi-forest - Hybrid Exchange scenario
Hi Experts, One of our customer raised the below query: They have the below environment: -Forest A & B have a forest trust configured -Both forests use Exchange 2010 mailboxes on premise -Both forests share the same smtp domain i.e. @contoso.com (both forests have mailboxes using the same domain) -Exchange 2016 is installed to enable a hybrid migration -ADFS is installed in Forest A only (as a trust is in-place it allows ADFS to be placed in one forest?) -AADC is installed in Forest A and synch’s both Forest A and B to O365 Aim: To migrate to Office 365 using hybrid from both forest A and B Query: What happens if mailboxes in both forest A and B have the same UPN suffix (i.e. contoso.com), which is the mailbox primary email domain as well? -Will ADFS be able to authenticate logons from both forests, bearing in mind that shared smtp domain is in use? -If ADFS cannot be used, can AADC password rep from both Forest A and B be used instead -Is there any way to use AADC with SSO from both Forest A and B to overcome the limitation introduced by the shared smtp domain used for both forest A and B? Any pointers would be of great help!! Many thanks in advance.