Due to the current situation regarding SARS-CoV-2, the Imaging Network now prohibits bookings of non-institutional devices. This means that microscopes which are used by other working groups via the Imaging Network are not allowed to be booked anymore until further notice.
Microscopes in your own institutes can still be used according to the institute's own rules regarding SARS-CoV-2.

For the use of microscopes I wouldrecommend the following recommendations of the German BioImaging network to you:
Recommendations SARS-CoV-2 GerBI-GMB

All the best and stay healthy,
Dr. Thomas Zobel