Make sure if you go via your bank that your transfer limit per day is at max allowable. Turns out that's 500k dh per day. Despite telling HSBC approx how much we were transferring, not one employee told us we had a max limit of 180k dh per day. We only discovered that once we left Dubai and, guess what? We tried increasing it online before our banking fob died but apparently that needs to be done in person...in Dubai!