From 1 August 2020 on, any new emails sent to you will no longer appear in your UU-Gmail account, nor will you be able to send any emails from there. Instead, you should log into your new Solis inbox at https://outlook.office.com (using your Solis-id and password).
All emails sent to you before 1 August 2020 will stay in your old UU-Gmail inbox. You will be able to access your old UU-Gmail inbox until 1 March 2021.
What should you do after 1 August 2020?
The emails in your old UU-Gmail inbox will not be forwarded to your new Solis email account automatically. You can transfer them yourself using the step-by-step guide at https://manuals.uu.nl/en/office365forstudents.
If you use any other parts of the Google Suite (such as G-drive), you may also have data stored there that you will have to convert before 1 March 2021. For information on how to do so, visit https://manuals.uu.nl/en/office365forstudents.