We’ve identified an issue with ClearContext Release Candidate v5.0.0 that may cause some contacts to be deleted in certain Outlook configurations. This issue can occur during Setup when upgrading from v4.6 and earlier. It does not impact upgrades from Beta 2 to v5.0.0 RC.
For most Exchange users, switching to your Contacts folder and selecting Tools->Recover Deleted Items should allow any affected contacts to be restored.
If you have been affected by this issue, please email email@example.com as soon as possible for assistance. We advise not to connect or sync Outlook with other PCs or devices before fully backing up your contacts from them.
We have pulled down the 5.0.0 build and will have a fixed release up as soon as possible. Please wait for that build to install ClearContext v5.0. Our sincerest apologies to anyone affected by this issue.