Does the MAC client support the feature where delegate permissions, set in outlook, flows though to SFB?

As per 

https://support.office.com/en-gb/article/Set-up-a-Lync-Meeting-on-behalf-of-someone-else-ef62a986-d5bd-46a0-84fc-69c09ba5aab9?ui=en-US&rs=en-GB&ad=GB

Is it possible to set an expiry date on a poll or do you have to communicate the deadline and then delete the poll to avoid others responding?

There is no way of sending an attachment/file through Skype for business on mac. 

Mac OS (10.11.6). 

Please help. 

Is it possible for a OneDrive for Business users to set ‘personal’ default sharing links that could override the settings configured in the OneDrive for Business admin centre?

Can anyone tell me how to calculate the following: Yearly % increase on hourly rate. Hourly rate is $88.68 and yearly increase is 1.025. I haven't used Excel for awhile and cannot figure out how I did this before. Any help will be greatly appreciated. Kat