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Microsoft Lync wants to use the OC_KeyContainer

Weird issue with Lync 2011 on MacOS / OSX:
Microsoft Lync wants to use the OC_KeyContainer keychain.

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Ran into a weird issue on Lync 2011 on my Mac machines (as a side note, how rubbish is this client? Let's hope the upcoming Skype for Business for MacOS is everything we expected and more… ). It was putting up a prompt saying:

Microsoft Lync wants to the "OC_KeyContainer_
useraddress" keychain

…and asking for a password. Usual user password doesn't work. Anyway, after some digging it's pretty easy to fix if you see it.

Exit Lync 2011.
Use Finder to go to the user's library - you can use 'Go to folder' and enter ~/Library

2016-10-11Library

In the Library folder, go into the Keychains directory. You'll see a few files called:

OC_KeyContainer_
useraddress

For example: OC_KeyContainer_AndyPandy@Contoso.com

Simply delete them. Once you've removed them start Lync 2011 again and it should continue as normal

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