Locate the relevant client via the Quick Search function and go the account in question. Click Report in the account menu, and under Payments you will see completed transactions in and out. If you instead click Pending transactions in the account menu you will see all transactions that have been registered but are not yet completed.
Some more useful information can be found here:
What is the timeframe for a regular withdrawal?
What is the timeframe for an ad hoc withdrawal payment from a GIA/ISA?