Many times the customer or the organization IT will “resist” to the recommendation of “installing the most updated Exchange rollup“ but, it’s important to emphasize that installing the most updated Rollups can prevent many of the future problems and consider as an important factor in the process of building the Hybrid environment.The following quotation relates to Rollups 4 for Exchange 2010 SP3, but you get the idea.Implementing Exchange Hybrid configuration in Office 365 environment can consider as a simple task or exhausting process.
The rollup packages are available via Microsoft Update and the Microsoft Download Center.
In the Search box on the Microsoft Download Center, type “Exchange 2010 SP3 updates rollup” to find links to the rollup packages for Exchange 2010 SP3..
The Public Domain name: o365info.com, configured as a “shared Domain”.
The meaning is that two separate Exchange infrastructure “represent” this domain name or shared between them the same domain name.
Additionally, we recommend installing future Update Rollups 4 for Exchange 2010 SP3 on all your hybrid servers.
Microsoft releases update rollup packages approximately every six to eight weeks.
The term Hybrid configuration was created, for describing this type of relationship between the Exchange On-Premise infrastructure and the cloud (Exchange Online) infrastructure.
For example, in the following diagram, we see the logical concept of Hybrid environment.
In this scenario, the “relationship” between the Exchange Online and the “on-Premises Exchange infrastructure” could be divided into many “communication channels” with different\separated Exchange on-Premises servers.