Hi Team -

Lync 2013 Mobile Client keeps prompting Sign-In credentials every-time whenever we relaunch or minimize and relauch the app on my Andriod phone, the lync client version is 5.6.3.8.

I've checked the checkbox to save my password, If i go and relauch the
Lync client , it will again asks for client sign-in information to
logging in to server

Seems like the application is having challenge running the in the background

Do this happen on one device or all the devices?

Have we tested this on Iphone or windows phone?

Hi,

Did the issue only happen for this Android Moto G2 2nd Gen mobile or for all mobiles?

If the issue only happen for this mobile, please try to uninstall the Lync app and then download the latest version from the link below and then test again:

https://play.google.com/store/apps/details?id=com.microsoft.office.lync15&hl=en

Note: Microsoft is providing this information as a convenience to you. The sites are not controlled by Microsoft. Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. Please make sure that you completely understand the risk before retrieving any suggestions from the above link.

Best Regards,
Eason Huang