Outlook Add-ins Crash Internet Explorer

Again another golden oldie I cam across. A client was integrating their CRM plugin with Outlook 2013 (In this example it was SalesForce, however they have since notified me that all add-ins from the Microsoft store also crashed Internet Explorer).

When they opened up an email and hit the CRM button, Internet Explorer would crash with the following error:

App Crash, 
Internet Explorer.exe
Faulting Module :ierutill.dll
Problem version of IE 11.9600.16428
outlook plugins crash internet explorer

After disabling and re-enabling various plug-ins I got the the source problem, UAC. It turns out the client disable UAC via GPO, becauseuac disabled add ins crash of this the add-ins seem to have issues speaking to IE.

As you can see from above the UAC is disabled, we set the UAC to Default and applied, upon testing the add-ins in Outlook again they all functioned correctly.

Allen White

Allen is a Consultant for ITPS in the North East of England and holds the following accreditations. MCSA, MCSE, MCTS, MCITP, CCA, CCSP, VCP 4,5 and HP ASE, AIS - Network Infrastructure.

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