If I attempt to add an online meeting to a meeting (using the button in outlook, in a meeting) it will fail.  I've tried both the release version of outlook and the preview release.

Both cause Lync to show the same error in the logs:

6/24/15 9:56:18.009 AM Microsoft Lync[3305]: Microsoft Lync(3305,0xa0f781d4) malloc: *** error for object 0x8203a300: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug

The error for object hex location changes each failure. 

Anyone have any ideas?  I've reinstalled Lync, tried multiple versions of Yosemite and a bunch of other stuff.  Any additional logging that might help?

Hi,

Please perform a clean uninstall of Lync for Mac 2011 with the help of the link below:

https://support.microsoft.com/en-us/kb/2691870

Then disable the Lync conference addin on Outlook and then enable it again to test the issue.

If the issue persists, please check Lync and Outlook update to the latest version. If not, update them and then test the issue again.

Best Regards,
Eason Huang

No luck.  Same error, though the hex address changes each time the error pops up.  

7/18/15 7:23:11.010 AM Microsoft Lync[43341]: Microsoft Lync(43341,0xa09921d4) malloc: *** error for object 0x81328430: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug

No change with the latest version of Lync for mac or outlook (released 7/23 and 7/28 respectively)

14.1.1 lync

15.12.3 outlook

7/29/15 9:07:17.594 AM Microsoft Lync[75944]: Microsoft Lync(75944,0xa09921d4) malloc: *** error for object 0x80955780: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug
7/29/15 9:23:00.278 AM Microsoft Lync[75944]: Replacing namespace soap
7/29/15 9:23:19.935 AM Microsoft Lync[75944]: Microsoft Lync(75944,0xa09921d4) malloc: *** error for object 0x80a10d00: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug
7/29/15 9:26:13.155 AM Microsoft Lync[75944]: Replacing namespace soap
7/29/15 9:26:49.925 AM Microsoft Lync[75944]: Microsoft Lync(75944,0xa09921d4) malloc: *** error for object 0x8088fba0: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug
7/29/15 9:27:24.584 AM Microsoft Lync[75944]: Replacing namespace soap
7/29/15 9:27:36.060 AM Microsoft Lync[75944]: Microsoft Lync(75944,0xa09921d4) malloc: *** error for object 0x80016010: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug
7/29/15 9:28:11.409 AM Microsoft Lync[75944]: Replacing namespace soap