Technical Clarifications related to Google Workspace to Microsoft 365 Fasttrack migration!

Hi,

We are part of preparatory planning from Google Workspace to Microsoft 365 preparatory planning, it would be great if some help with the below queries w.r.t migration,

• We want to understand more about Staged/Complete one time cutover along with it's pros/cons
• While we have referred this https://learn.microsoft.com/en-in/fasttrack/data-migration, below point confirms that share drive membership permissions will not get migrated, my question is what about permissions migration for folders, files with shared drive - Whether it will get migrated or not?

"Shared Drive membership permissions (Note: Use Google Drive Admin reports to identify shared drive memberships. Instruct end users to configure these membership settings on the target before migration.)"

• My next question related to the same https://learn.microsoft.com/en-in/fasttrack/data-migration, below point confirms that formulas will not get migrated, My question is basic formulas like sum, vlookup etc...used in google sheets will not get migrated or only specific formula will not migrated - Need more clarity as our most of the google sheets will have formulas used?

"Google Sheets are converted to Excel files, but custom scripts, formulas, and macros are not migrated"

• My next question related to the same https://learn.microsoft.com/en-in/fasttrack/data-migration, below point confirms that content not owned by google account will not get migrated, My question is what exactly it means - What happens to the data which are owned/created by other domain users as part of collabration?

"Content not owned by the Google Drive account being migrated"

• My next question related to keeping the Google workspace & Microsoft accounts in parallel during & after cutover - How it works technically, can someone through more light here to understand the logic of cutover?