Sorry not sure? If we run command prompt as administrator and launch MSI file from there, it runs installation without issues. Either way, tried lot of stuff but no luck, its safe to say that its something wrong with my workstation, sorry about generalization, should've tested more extensively. Basically Enterprise vault add-in doesn't shows up in list of installed add-ins altogether in Outlook, trying to figure out why. No ereors in logs or while running resetevclient.

Appendix A provides details of the versions of software that have been dropped since Enterprise Vault 11.0. Support for Outlook 2016 on the Enterprise Vault server. Kartochki ovoschi i frukti. Archiving from Exchange public folders is now supported with Outlook 2016 on the Enterprise Vault server.

• Un-installed, re-installed EV client • Un-installed, re-installed office package • Disabled, Zapped & re-enabled mailbox for archiving • Re-created Outlook profile • No RPC over HTTP Weird one, only thing I can think of is to re-install OS, but that's lot of trouble for same, can use OWA and be happy with it lol.