Is there a way I can check the date I blocked a contact on Lync? I need to know the exact date I blocked a contact

I don't believe this is possible but if it is the only way would be to find it in the database.

Hi,

You can try to search from the following databases:

Rtc: stores persistent user data such as user contact lists, scheduled conferences, and access control lists.

Rtcdyn: stores dynamic Lync user data such as presence information.

Rtcab & Rtcab1: stores the raw Lync address book information (i.e. that is pulled from AD). 

If you cannot find it may be not stored in database.

Best Regards,

Eason

Hi,

I don't think this information get saved in any of the databases at all. you won't be able to get this information out of Lync server.