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office365 email compromise

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Last Modified: 2020-02-11
If someone has compromised as in gained unauthorised access) to an Office365 email account, for the purposes of data access, is there anyway they could lead emails out to an external address without it leaving a trace in the tracking logs? With such an attack how is it likely the attacker would make use of the access they have achieved through whatever compromise, to read/use the data? It seems a bit simplistic to me to just start forwarding them outwards, but I am not sure how these attacks happen and what exactly it is they would do with their access once achieved (and how to determine what if anything they did do once access was achieved).
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