e-conomic is performing an upgrade of its system during a 6-hour time span on Sunday (August 21) from 00:01 to 06:00 CET. Therefore you cannot log on to e-conomic and use the system in this period.
Please note that if your integrations to e-conomic do not support post-synchronization of data, any data exchanged with e-conomic in this period might be lost.
After the 6-hour upgrade, all systems will return to normal operation at 06:00 CET on August 21.