For Skype for Business Online organizations, you can use the Remote PowerShell in Office 365 to enable your Skype for Business users to use the Skype for Business client or the Skype for Business (Lync) client user interface. The default setting is for users to use the Skype for Business client user interface.
Yes you do - all of it, but under most circumstances, not until after you graduate college (or leave school for other reasons). Under normal circumstances when you graduate or drop below a certain # of units of attendance, you will be expected to begin paying back your student loan 6 months later. For subsidized student loans, this is when the interest will start accruing as well.
The realistic time frame for you ranges from 30 days to 90 days. In some cases, paying off your loan can take a bit longer than 90 days, though it is not supposed to. A good rule of thumb an a car loan pay-off is 45 days. You credit score on all three credit reports will reflect the loan payoff eventually, though Experian might come in at 30 days and TransUnion at 45 days. Might be a good idea to sign up for the three-in-one credit report when your loan is paid off.