Gmail labels vs Outlook folders — what actually happens to nested labels?

Nesting is preserved. `Clients/Active/Northeast/2026` becomes a real four-level folder tree in Outlook, not a folder literally named with slashes in it. Gmail already stores nested labels using `/` as the separator, so the hierarchy is explicit in the data and translates directly.

Three things that genuinely do change, and you should tell your sales team about them up front:

• Multi-labeled messages. A message with both `Clients/Active` and `Urgent` goes into the primary label's folder, with the extra labels preserved as Outlook categories. It does not get duplicated into two folders.
• All Mail is skipped. It is a virtual view containing every message you already have elsewhere. Migrating it doubles the mailbox.
• Character limits. Outlook enforces a maximum total path length. Very deep trees with long names can hit it, and the folder gets truncated with a suffix. Five levels of ordinary names is fine; twelve levels of sentence-length labels is not. Your pre-flight report flags any path at risk before you migrate.