I had some questions on AD replication that I was hoping someone could help me with.
I have a multi-domain forest, company.com, with child domains eu.company.com, us.company.com and jp.company.com
In eu.company.com, we have AD Sites set up in Germany, UK, France, Holland and Switzerland. Each site has two DC's apart from Swizterland which has one.
If I check AD Sites and Services, I can see an IP Site link between UK and Switzerland. There are no preferred bridgehead servers. in the NTDS settings of SWISS-DC1, I can see an entry to replicate from UK-DC1 (and likewise for UK-DC1).
Question 1: Does this mean that SWISS-DC1 will *only* replicate to/from UK-DC1? Or will it replicate with other UK DC's too?
Question 2: Recently, France had 3 Domain Controllers, however one was decommisionned and DCPromo'd down. I can't see an IP Site link between France and Switzerland. Is it possible that FRANCE-DC3 was set up to replicate with SWISS-DC1, and when FRANCE-DC3 was removed from AD, the Site Link was automatically removed too?
Question 3: If I go to Inter-Site Transports > IP > Properties, I can see that 'Bridge All Site links' has been ticked. Does this mean that DC's can replicate with other DC's that aren't specifically mentioned in their NTDS Settings Properties?
Question 4: If I go to a DC, NTDS Settings, then I can see other DC's that it is set to replicate from. What is the meaning of this if it can replicate from other DC's in the forest/domain?
Thanks in advance!