Microsoft has released updates for Lync Server 2013 and Lync Server 2010 on time for their quarterly release cadence. The updates are bug fixes to the product and not introducing new features (none of the 2013 databases are updated in this release). If this CU is being applied to RTM, then follow the instructions here to update or check your version level using Doug Deitterick’s blog post.

In addition to the server patches, the Debugging Tools and Resource Kit has been updated. Unfortunately the updates are actually full installs so you will need to uninstall any previous versions before the apps are “updated”. The good news is the Debugging Tools contain the correct updated TMX file from the January 2014 CU so there is no need to manually replace it with the locally installed copy.

Finally, Lync Edition phones have been update which include the entire line of Aastra, HP, and Polycom phones. Updating them is the same method it has been so no news there.

Additional Notes:
Lync Server 2010 build number is 4.0.7577.225
Lync 2010 Client build number is 4.0.7577.4419
Lync Server 2013 build number is 5.0.8308.577
Lync 2013 Client build number is 15.0.4551.1007
Lync Group Chat build number is 4.0.7577. 4409
Lync Group Chat Server build number 4.0.7577. 4409
Lync Group Chat Admin build number 4.0.7577. 4409
Lync Attendee build number is 4.0.7577.4356
Lync Attendant build number is 4.0.7577.4098
Lync Phone Editions build number is 4.0.7577.4420
Lync 2010 for iPhone build number 4.7
Lync 2010 for iPad build number 4.7
Lync 2010 for Android build number 4.0.6509.3001
Lync 2013 for Windows Phone build number is 5.2.1072.0
Lync 2013 for iPad build number is 5.2
Lync 2013 for iPhone build number is 5.2
Lync 2013 for Android build number 5.1.0000
Lync Basic 2013 build number is 15.0.4420.1017
Lync VDI 2013 build number is 15.0.4420.1017

Yesterday Microsoft released CU April 2013 for Microsoft Lync Server 2013. The update only lists a big fix for Live Meeting audio issues so I would not consider a must-have (it is also an update by PSS request). Since February just came out it may be a hard justification to shut down and install a new update but the info is included below. This is the first CU for Lync Server that does not include the database upgrade requirements.

Additional Notes:

Lync Server 2010 build number is 4.0.7577.216
Lync 2010 Client build number is 4.0.7577.4378
Lync Server 2013 build number is 5.0.8308.291
Lync 2013 Client build number is 15.0.4454.1506
Lync Group Chat build number is 4.0.7577.4102
Lync Group Chat Server build number 4.0.7577.4778
Lync Group Chat Admin build number 4.0.7577.4102
Lync Attendee build number is 4.0.7577.4356
Lync Attendant build number is 4.0.7577.4098
Lync Phone Edition Polycom build number 4.0.7577.4372
Lync Phone Editions (other than Polycom) build number is 4.0.7577.4366 (4363 for CX700/8540)
Lync 2010 for iPhone build number 4.7
Lync 2010 for iPad build number 4.7
Lync 2013 for Windows Phone build number is 5.0.8250.0
Lync 2013 for iPad build number is 5.0
Lync 2013 for iPhone build number is 5.0
Lync Basic 2013 build number is 15.0.4420.1017
Lync VDI 2013 build number is 15.0.4420.1017