After installation of Exchange 2010 service pack 3, my Windows Phone 8.1 require password on screen saver and i can't disable  password request because the group policy. I researched in domain group policy but the policy of passwords on screen savers is not configured in all branches.

Mobile devices, which aren't domain members, shouldn't be affected by group policy.  Double-check your mobile device policy.

https://technet.microsoft.com/en-us/library/bb123783%28v=exchg.150%29.aspx?f=255&MSPPError=-2147217396

Hi
1. After update, need check current work virtual directory and services OWA, AS, ECP, EWS.

Test-ServiceHealth | ft >>c:\temp\Name_cas_server.TXT
Test-MapiConnectivity | ft >>c:\temp\Name_cas_server.TXT
Test-OutlookConnectivity -Protocol http | ft >>c:\temp\Name_cas_server.TXT
Test-OutlookConnectivity -Protocol tcp | ft >>c:\temp\Name_cas_server.TXT
Test-OutlookWebServices | ft >>c:\temp\Name_cas_server.TXT
Test-WebServicesConnectivity | ft >>c:\temp\Name_cas_server.TXT
Test-EcpConnectivity | ft >>c:\temp\Name_cas_server.TXT
Test-ActiveSyncConnectivity | ft >>c:\temp\Name_cas_server.TXT
Test-PowerShellConnectivity | ft >>c:\temp\Name_cas_server.TXT

2. Test AS from internet https://testconnectivity.microsoft.com/ 

3. Managing Exchange ActiveSync Devices

Error when you try to synchronize a Windows Phone-based device to an Exchange server

4. Check policy supported parameters

Supported Exchange ActiveSync policy parameters in Windows 8 and RT

Hi Simone,

Thank you for your question.

I agree with Ed, it could not be disabled by group policy owning to not domain member. we could refer to the link which Ed supply.

In addition, if it didnt work, we could restart IIS.

If there are any questions regarding this issue, please be free to let me know. 

Best Regard,

Jim

Thank you, I'have found solution at this link: http://blog.ronnypot.nl/?p=868

After you have configured your mobile device to receive its business e-mail via ActiveSync from your SBS 2011 Exchange 2010 server, it is asking for a 4 digit pin code. This is because the default configuration on the SBS 2011 Exchange Server is to require a password for ActiveSync devices when they are going to synchronize with your server. - See more at: http://blog.ronnypot.nl/?p=868#sthash.z2grdrhx.dpuf