Exchange product team has released RU2 for Exchange 2010 SP2 last week.
This update specifically call out the following fixes which are included in this release:
- KB2696913 You cannot log on to Outlook Web App when a proxy is set up in an Exchange Server 2010 environment
- KB2688667 High CPU in W3WP when processing recurrence items who fall on DST cutover
- KB2592398 PR_INTERNET_MESSAGE_ID is the same on messages resent by Outlook
- KB2630808 EwsAllowMacOutlook Setting Not Honored
- KB2661277 Android/Iphones stuck with 451 during Cross forest proxy in datacenter
- KB2678414 Contact name doesn’t display company if name fields are left blank
All about Microsoft 365 & Teams 
I personally Feel blog post, “Released: Update Rollup 2 for Exchange
2010 Service Pack 2 | A Messaging / Unified Communication Portal”
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Many thanks Brock !! Sorry for late reply 🙂