Did anyone else run into an issue with Android Skype for Business mobile app can't access the meetings data on Exchange via F5 and Exchange 2013 iApp? I am getting an error: Your Exchange login credentials aren't valid. Try updating your Exchange or Skype for Business credentials or We can't connect to Exchange. Please try later From Outlook or iPhone Skype there are no issues to access the Exchange. This is obviously an auth issue specific to Android. Was hoping someone ran into it and can give some advice. Thanks

What is the backend environment? Are you pure Exchange 2013, or Exchange 2013/2010 co-existence?

2 x Exchange 2013 CAS servers Update: If I change my Exchange profile >> Exchange Web Service >> Front End Authentication from Basic-NTLM to Basic I manage to get the calendar information in the Android app but still having the error message about

You should turn up debug logging for APM SSO and ECA and examine /var/log/apm for these Android requests. Which version of BIG-IP are you running?

We had some similiar issues when we stood up our Exchange 2013 environment recently. Here are some troubleshooting steps that might help; 1. Take a tcpdump on the F5 capturing the login attempt from a single device (filter to the host). 2. Check the tcpdujmp, along with the debug logs from Skype for Android for both the autodiscover, and the login call. 3. Validate that both Autodiscover, and EWS services are set to support baisc authentication *For number 3, this is critical. It is a limitation of the Skype mobile client that only basic authentication is supported, no other method will work.

Thanks for the response. 1. I tried that with F5 support but I could not decrypt the output with ssldump tool. It appears I need to use a differen cipher in order to be able to do that. 2. What do you mean debug logs from the Skype for Android, how can I get that? 3. As I mentioned, EWS had Basic+NTLM enabled, which didn't work. When I changed to Basic only, it seemed to work partially but still gives an error. How did you eventually resolve your issues?

Forum Discussion

Yuval_BA_249670

Nimbostratus

Apr 26, 2016

Android Skype for Business issue with Exchange iApp

Did anyone else run into an issue with Android Skype for Business mobile app can't access the meetings data on Exchange via F5 and Exchange 2013 iApp?

I am getting an error:

Your Exchange login credentials aren't valid. Try updating your Exchange or Skype for Business credentials

We can't connect to Exchange. Please try later

From Outlook or iPhone Skype there are no issues to access the Exchange.

This is obviously an auth issue specific to Android. Was hoping someone ran into it and can give some advice.

Thanks

application delivery

BIG-IP Access Policy Manager (APM)

iApps

16 Replies

mikeshimkus_111
Historic F5 Account
Apr 27, 2016
I should have asked before, but I assume that these clients work OK if you either a)bypass BIG-IP completely or b)access via a virtual server without APM enabled? I found this information on Android clients for SFB: https://support.microsoft.com/en-us/kb/2834018 https://support.microsoft.com/en-us/kb/2829747 Do your clients meet those requirements?
p_merrick_13422
Historic F5 Account
Apr 27, 2016
Can you tell me what android device that is failing? is it on the list provided below? https://support.microsoft.com/en-us/kb/2829747
Yuval_BA_249670
Nimbostratus
Apr 27, 2016
The device works fine when the access was via TMG before we migrated to the APM (I also rolled back to confirm) The device is Samsung Galaxy S5 running Android version 5.0