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New Member

Unity Connection 8.6 - Office 365 UM Integration - Strange IPv6 DNS Resolution

Hi everyone, 

I am integrating Cisco Unity 8.6 with Microsoft Office 365 and I am getting a strange IPv6 issue that is preventing the system from accessing the mailbox in the could. 

All the instructions were followed, and the hosted exchange server was configured as "outlook.office365.com" 

When I go to test a user with UM setup for this integration, the Unity server tries to connect to the hosted exchange server using it's IPv6 address: 2a01:111:f400:840::2:

 

Here's the test result:

 

Some possible reasons for 503: Server busy. Service offline. Attempting access using HTTPS when HTTP is required.

 

HTTP status=[503 Service Unavailable] Diagnostic=[Couldn't connect to server -- Failed to connect to 2a01:111:f400:840::2: Network is unreachable] 

I looked it up and 2a01:111:f400:840::2: is indeed outlook.office365.com. 


My Unity server is NOT setup for IPv6. When I test from CLI, IPv4 DNS resolution is working:

 

admin:utils network ping outlook.office365.com

PING outlook-namnortheast.office365.com (132.245.4.130) 56(84) bytes of data.

 

Any ideas on how to stop it from getting an IPv6 address?

3 REPLIES
New Member

Known issue...please see

Known issue...

please see:

https://supportforums.cisco.com/discussion/11901446/cuc-upgrade-862es4422900-44-86224092-1-failing

Microsoft dns is replying with ipv6 first.. 

either use ip addresses or upgrade to 9.x unity connection.

New Member

Thank you for your reply.

Thank you for your reply. When I do a lookup, I see the IPv6 addresses first:

 

> outlook.office365.com
Server:  [10.7.7.240]
Address:  10.7.7.240

Non-authoritative answer:
Name:    outlook-namnortheast.office365.com
Addresses:  2a01:111:f400:854::9
          2a01:111:f400:854::12
          2a01:111:f400:878::6
          2a01:111:f400:878::9
          2a01:111:f400:88c::9
          2a01:111:f400:16::2
          2a01:111:f400:16::12
          2a01:111:f400:2a::9
          2a01:111:f400:840::2
          2a01:111:f400:840::9
          132.245.8.9
          132.245.8.12
          132.245.8.166
          132.245.8.169
          132.245.9.233
          132.245.13.217
          132.245.3.210
          132.245.3.220
          132.245.4.130
          132.245.4.137
Aliases:  outlook.office365.com
          outlook.office365.com.glbdns.microsoft.com

 

 

If I set the server as one of the IPs listed above, I get the following error from CUC test:

 

Diagnostic=[SSL connect error -- Unknown SSL protocol error in connection to 132.245.8.9:443 ] Verb=[POST] url=[https://132.245.8.9/EWS/Exchange.ASMX] 

New Member

Were you able to resolve the

Were you able to resolve the issue? I am setting up a connection to a hosted Exchange environment and I am getting:

"Diagnostic=[SSL connect error -- Unknown SSL protocol error in connection to x.x.x.x:443"

I have verified the URL and login.

 

thanks

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