Cannot synchronize with corporate address book. This may be because the proxy server setting in your browser does not allow to access the address book. If problem persists please contact your administrator

Issue :Communicatior client couldnot showing addressbook entries

I faced an issue with a user saying that he is not able to browse corporate address book and showing an error

·         "Cannot synchronize with corporate address book. This may be because the proxy server setting in your browser does not allow to access the address book. If problem persists please contact your administrator."

Resolution

I have seen a lot of tutorials related to this but I found an effective way in resolving this issue

Open certificate store using mmc and select Computer certificates

Start-> run->mmc and hit enter

Click File -> Add /remove  snap-in and click add button in Stand alone tab

Select Certificate and click Add

Select Computer account and hit next

Confirm radio button at Local computer click finish and close

Hit ok and you will get certificate console

Open certificates under

1)Personal

2)Trusted root

3)intermediate certification authorities and remove all old certificates before todays date

Close the mmc

Open IE -> Tools-> internet options-> Advanced ->under security settings un-tick “Check for publisher’s certificate revocation

After that the issue is resolved