Determine the Azure AD Connect Installation File Version

Sometimes you want to use an older AADConnect installation file for some reason (usually due to a broken update), and you would want to know the version *before* installing it.

The easiest way to find out is to use 7-Zip to open up the MSI file, expand media1.cab file, and extract the file "Microsoft_Azure_ActiveDirectory_Synchronization_Setup_dll".

Rename it to "Microsoft_Azure_ActiveDirectory_Synchronization_Setup_dll.dll" and right click on the file, Properties and then Details tab:

In my case, it's version 1.0.9131, released in December 2015.

You can get the full version history for Azure AD Connect here:

https://azure.microsoft.com/en-us/documentation/articles/active-directory-aadconnect-version-history/

Bonus tip! To manually force a sync using AADConnect 1.1, run the following PowerShell cmdlets:

Full Sync: 

Start-ADSyncSyncCycle -PolicyType Initial

Delta Sync:

Start-ADSyncSyncCycle -PolicyType Delta

Source: https://azure.microsoft.com/en-us/documentation/articles/active-directory-aadconnectsync-feature-scheduler/