Company is moving from Outlook with local PSTs to Google Workspace, 25 users. Some PSTs are 15GB plus. Google's own migration tool choked on the large files twice. What actually works for big PSTs?
How to migrate Outlook emails to Google Workspace?
Solved Cloud & Migration
RK
Rachel Kim March 19, 2020
2 replies
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GWMMO struggles past a few GB, that is a known pattern. Working routes:
1
Split first: cut the big PSTs by year with a PST splitter, then feed GWMMO the pieces. Free but slow across 25 users.
2
Direct: SysTools PST to Google Workspace uploads PSTs straight into user mailboxes using a service account with domain wide delegation. Handles large files with resume, runs users in parallel and maps folders to labels sensibly.
Either way run one pilot user end to end before the fleet, label mapping surprises are cheaper to catch on one mailbox.
Direct route with a pilot first. All 25 done over a weekend including the 15GB monsters. Solved.