Sorry for the confusion.. we planned this for quite some time and got this now arranged with the satellite operator.
The mailbox message transmitted by the beacon was changed this week (yesterday, I think):
L HI de Qatar-OSCAR 100 (DL50AMSAT)
Transponder is open for general use since 2019-02-14.
Enjoy the Narrow Band (NB) and Wide Band (WB transponders.
Follow the guidelines and keep transmiter power below beacon.
For more information visit: http://amsat-dl.org/
QO-100 was brought to you by Es'hailSat, QARS and AMSAT-DL.
Good Luck and Good DX via the first geostationary P4-A satellite
Maybe changes like this could be communicated there? Or is it difficult to quickly change the message?