Earlier today the Exchange CXP team released Update Rollup 5 for Exchange Server 2010 SP1 to the Download Center. This update contains a number of customer-reported and internally found issues ...
Updated Jul 01, 2019
Version 2.0
Blog Post
I installed RU5 on Monday in production environment and there were not any problems and everything works fine, so I think that is safe enough to install this RU.