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Lync 2010 mobile client may receive multiple push notifications for a single message

Article ID: 2728915 - View products that this article applies to.

SYMPTOMS

The Lync 2010 mobile client may receive multiple push notifications for single instant message (IM) in the following three scenarios:

A new installation of the Lync server mobility component
After updating the Lync 2010 mobile client
The Lync 2010 mobile client was abnormally terminated after completing its sign-in process

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CAUSE

Multiple push notifications for a single IM can occur:

When a single Lync 2010 mobile client has registered multiple instances of its EndpointId value

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The resolutions for the three separate scenarios that are previously described in the Symptoms section of this article are listed below:

Scenario 1

New Lync Mobility deployments share the same HLB configurations as Lync Server 2010 web services. The HLB configuration for Lync Mobility must include cookie-based persistence for TCP port 80 or TCP port 4443. Not using cookie-based persistence as part of the HLB configuration for Lync Mobility can cause the Lync 2010 mobile client to perform concurrent registrations at separate Lync Server 2010 pools.

For more detailed information on supported Lync Mobility HLB deployments:

Hardware Load Balancer Requirements for Lync Server 2010

(http://blogs.technet.com/b/nexthop/archive/2011/11/03/hardware-load-balancer-requirements-for-lync-server-2010.aspx)

Technical Requirements for Mobility

(http://technet.microsoft.com/en-us/library/hh690030.aspx)

Scenario 2

The updated Lync 2010 mobile client registers itself using its new client software version. This can create multiple registrations for a Lync 2010 mobile client to the Lync Server 2010 pool. To avoid multiple registrations for same Lync 2010 mobile client, completely sign out of the Lync 2010 mobile client prior to performing any Lync 2010 mobile client updates.

Scenario 3

Always sign completely out of the Lync 2010 mobile client prior to turning off its supported device. After completing the sign in process to the Lync Mobility server the Lync 2010 mobile client will be registered on the Lync Server 2010 pool. If the Lync 2010 mobile client is abnormally terminated on its supported device its registration information is not removed from the Lync Server 2010 pool. Subsequent Lync 2010 mobile client sign in for the same Lync 2010 mobile client may write additional registration information for that Lync 2010 mobile client to the Lync Server 2010 pool.

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Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use

(http://go.microsoft.com/fwlink/?LinkId=151500)

for other considerations.

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