Microsoft Showcase School and MCE Vouchers...

hello DiogoAzeredo​ Thank you for explaining the situation so clearly. Since your school is a long-standing Microsoft Showcase School, it would definitely be worth reaching out directly to the Microsoft Education team to explain the missed communication due to the email/network issue.

Although the original deadline has passed, exceptions or alternative options may sometimes be considered on a case-by-case basis, especially for active Showcase Schools.

I would recommend:

Replying to any previous Microsoft Education program emails you have received

Contacting your regional Microsoft Education representative or Showcase School contact

Posting the request in the Microsoft Education Community channels as well, where program administrators may see it

Be sure to include:

Your school name

Showcase School status

The reason the email was missed

The number of educators affected

Hopefully the team can advise whether vouchers can still be issued or if another opportunity is available.

Wishing you the best, and hopefully this can still be resolved positively.