I have an Exchange 2003 SP2 setup with a front-end server and two backend servers(active/active cluster), together with Enterprise Vault 2007 SP2 (7.5 SP2).
I could access archived items fine from the OWA but the Archive Explorer and Archive Search both showed blank pages.
The file evservers.txt which is used on both the front-end and backend servers to configure the proxy bypass list was saved in ANSI format. After I saved the file in Unicode format and ran the BackEnd2003Setup.wsf file again, then archive explorer and search worked as it should.
In the BackEnd2003Setup.wsf.log file you can also see that it now can read the entries in evservers.txt