Exchange 2013 Certificate issues?

Hello all

New install (and im new to Exchange!) of Exchange 12. Movign from Mdaemon

i can send & receive mail though outlook and owa.

Im now trying to configure mobile devices.

I have configured "Device Access Rules" with

Device family - all families

Only this model - EASProbeDeviceType

Allow Access

If i try to add my account to my Samsung phone (S6 edge if that makes a difference)

after enter credentials i get a warning stating

"security Warning

there is problems with the security certificate for this site

the name of the site does not match the name on the certificate"

Within Servers > certificates > i have a certificate that was purchased from Comodo, with our domain etc

"mail.domainname.com"

any ideas?!
mudcow007Asked:
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StuartTechnical Architect - CloudCommented:
Did you set your active sync external URL match mail.domain.com?

Set-ActiveSyncVirtualDirectory -Identity "<CAS2013>\Microsoft-Server-ActiveSync (Default Web Site)" -ExternalUrl "https://mail.contoso.com/Microsoft-Server-ActiveSync"
mudcow007Author Commented:
Weirdly this error resolved itself over night?!

the joys of Exchange i guess?

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mudcow007Author Commented:
It fixed itself....
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