Does delegate access to any mailbox occupy space in Outlook

[A_Sidhu]

Hello,

I would like to confirm if providing delegate (full access) to a user will occupy space on his outlook?

Also, Does a shared mailbox occupy space in Outlook?

[#2]

Depends on what you mean here. If you have another user's mailbox added in Outlook in cached mode, with the "download shared folders" checkbox toggled, it will increase the size of the local Outlook profile, yes. It doesnt affect the actual mailbox size though.