Not trying to hijack this thread but I have a similar question. Client previously had on prem Exchange with on prem GFI Archiver. All up there is approximately 400GB in GFI Archiver. Client moved to O365 and has not had an archive solution for this. Current size of O365 store is approximately 300GB. So, client is now looking to consolodate their old on prem GFI Archive and current O365 store to EV.cloud.
From what I have found from info on the net is that we'd likely have to export GFI to PST's and then importing into EV.cloud. Is there a simpler way other than using PST's? Can this data be placed on a HDD and sent in somewhere for Veritas to import? Internet in Australia is terrible and so this would take a while to seed.