If your team confirm their e-mail address then contact them directly there but you should not forget to use the PSA's messenger minimum twice per month.
Also if some of them are living in the same country as you and they provide you their phone in their SFI account, this is also good way to keep in touch and motivate them.
Don't forget to make competitions often and give them reward for participation, then they will initiate more often communication with you.
If your team confirm their e-mail address then contact them directly there but you should not forget to use the PSA's messenger minimum twice per month.
Also if some of them are living in the same country as you and they provide you their phone in their SFI account, this is also good way to keep in touch and motivate them.
Don't forget to make competitions often and give them reward for participation, then they will initiate more often communication with you.