FYI: I requested an increase of the quota for low-priority cores (20) for one of my batch-accounts. It took some days, but then the quota was increased without any problem.
Requesting the quota-increase is very easy. If you go to your batch-account, there's the item "quotas" on the left pane. After clicking it it will show you your current quota-settings, and there is also a button "Request quota increase". You can just click it and fill the following form to get the increased quota (processing the request will likely take some time, though). For most cases 20 low-priority cores should be enough. I haven't tried it, but i guess if you are asking for a much higher quota azure might actually ask what you are planning to do...
Requesting the quota-increase is very easy. If you go to your batch-account, there's the item "quotas" on the left pane. After clicking it it will show you your current quota-settings, and there is also a button "Request quota increase". You can just click it and fill the following form to get the increased quota (processing the request will likely take some time, though). For most cases 20 low-priority cores should be enough. I haven't tried it, but i guess if you are asking for a much higher quota azure might actually ask what you are planning to do...
Do they send any email to confirm or you just request and the "system" automatic increase ^^?