Polycom FW version 5.5.3 and Exchange hybrid.
From the logs we see that Polycom tries to perform autodiscover, but finally fails and leave EWS not deployed for online users. I will continue debuging that, but I found a workaround:
login with sip and UPN as firstname.lastname@example.org but leaving domain field empty.
Then in settings-applications-exchange server URL you can hardcode:
and leave autodiscover disabled.
Update: with CURL DEBUG we can see that problem was in SSL certificates of Digicert not being trusted due to limits we left from other tests in Network - TLS - Application profile 6 (select certificates from platform or imported, but we had only one certificte selected). I also imported Digicert root, as for unknown reasons outlook is based on that while rest of MS is Baltimore.
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Latest debugging tools for SFB have a bug, dowload previous version:
Friday, September 15, 2017
ADFS access control rules to disable MFA for Office 365 application if usrs are connecting from intranet, Lync clients and enforce MFA for member of AD group:
$rp = Get-AdfsRelyingPartyTrust –Name "Microsoft Office 365 Identity Platform"
$groupMfaClaimTriggerRule = 'NOT EXISTS([Type == "http://schemas.microsoft.com/2012/01/requestcontext/claims/x-ms-client-user-agent", Value =~ "(?i)skype"]) && NOT EXISTS([Type=="http://schemas.microsoft.com/2012/01/requestcontext/claims/x-ms-client-user-agent", Value =~ "(?i)ACOMO"]) && NOT EXISTS([Type=="http://schemas.microsoft.com/2012/01/requestcontext/claims/x-ms-client-user-agent", Value =~ "(?i)lync"]) => add(type = "http://schemas.company.com/not_lync", value = "true" );
c1:[Type == "http://schemas.microsoft.com/ws/2008/06/identity/claims/groupsid", Value == "S-1-5-21-796845957-688789844-854245398-6148"] && c2:[Type =="http://schemas.company.com/not_lync", Value== "true"] && c3:[Type =="http://schemas.microsoft.com/ws/2012/01/insidecorporatenetwork", Value== "false"]=> issue(Type = "http://schemas.microsoft.com/ws/2008/06/identity/claims/authenticationmethod", Value = "http://schemas.microsoft.com/claims/multipleauthn");'
Set-AdfsRelyingPartyTrust –TargetRelyingParty $rp –AdditionalAuthenticationRules $groupMfaClaimTriggerRule
We use this rule to let Lync on Premises users to use Exchange online