I just upgraded my Surface Pro from Win 8.1 to Windows 10.  Previously I had used the mail app with our exchange server with no problems.  Upon upgrading to 10 the mail app no longer works.  

Message comes up that "the device doesn't meet the security requirements set by your email administrator at VSAC, you'll need to update your settings."   Device settings are in accord with our policies-- spent an hour with our exchange server admin trying to troubleshoot.  After extended run time get message "something went wrong.... "we weren't able to apply the security policy that's required by ....... Contact your company's support person to fix the problem."  Error code:  0x86000c29.

Seeing rumors on web that there is a known bug.  Is there any information available?  Thoughts on what we can do?

Hate to do a restore to 8.1 but am about to do it.  Not useful if mail map is incompatible with exchange server.

Hi,

During my test, it works fine in Windows 10 with Exchange account. When I login Exchange account, I get this reminder as below:

This may be occurring due to one of the following:
1. Your computer may not meet the Microsoft Exchange servers security requirements. The most common reasons why your PC might not meet the Microsoft Exchange servers security requirements for this account:
An administrator account on your PC doesnt have a password. All administrator accounts must have a password.

To meet the security requirements, you can:
   Set a password for all administrator accounts on your PC.
   Remove administrator privileges for any administrator accounts on your PC that dont have a password.
   Remove any administrator accounts from your PC that don't have a password.

BitLocker couldnt automatically be enabled on your PC. Enable it in Control Panel and then try connecting to your mail account again.

2. Your Microsoft Exchange server requires security policies that the Mail app cant support.  The Mail app supports the following Microsoft Exchange ActiveSync security policies:
   Password required
   Allow simple password
   Minimum password length
   Complex passwords
   Password history
   Enforce password history
   Device encryption
   Remote wipe

Which version are you used for Exchange? Here's an article about Understanding Exchange ActiveSync Mailbox Policies for Exchange 2010, for your reference: https://technet.microsoft.com/en-us/library/bb123484(v=exchg.141).aspx