Open IIS manager on OWA server.
Expand Default web site and click on owa.On right hand panel double click on Modules.
Under Modules click on Configure native Modules (Actions panel).
Here select exppw and click ok.
After that perform a iisrest and perform a test.
https://social.technet.microsoft.com/Forums/en-US/0399d42f-3272-4c5c-90df-7a9eb32d5ca9/exchange-2010-sp3-rollup-25-breaks-quotuser-to-change-password-at-next-logonquot-for-owa?forum=exchange2010