I have an error when I try to add an user:

Error shows like that:

I see the new user in the panel :

In the email logs I can see an error, I don't know how I can modify this hardcoded@email.com setting.
554 5.2.252 SendAsDenied; xxxxx@xxxxx.com not allowed to send as hardcoded@email.com; STOREDRV.Submission.Exception:SendAsDeniedException.MapiExceptionSendAsDenied; Failed to process message due to a permanent exception with message [BeginDiagnosticData]Cannot submit message. 0.35250:6A360000, 1.36674:01000000, 1.61250:00000000, 1.45378:02000000, 1.44866:00000000, 1.36674:7A000000, 1.61250:00000000, 1.45378:05000000, 1.44866:00140000, 1.36674:0A000000, 1.61250:00000000, 1.45378:16000000, 1.44866:3D520000, 1.36674:0E000000, 1.61250:00000000, 1.45378:56520000, 1.44866:F4000000, 16.55847:C12C0000, 17.43559:0000000030020000000000000000000000000000, 20.52176:140F9C9B250070201F000130, 20.50032:140F9C9B9517101012000000, 0.53414:0201E265, 0.35180:03004E67, 255.23226:37000000, 255.27962:7A000000, 255.27962:0A000000, 255.27962:0E000000, 255.31418:03000136, 0.35250:FB000B0E, 1.36674:0A000000, 1.61250:00000000, 1.45378:02000000, 1.44866:38000000, 1.36674:32000000, 1.61250:00000000, 1.45378:3D000000, 1.44866:01000000, 16.55847:B3000000, 17.43559:00000000B8030000000000000000000000000000, 20.52176:140F9C9B250070200A005180, 20.50032:140F9C9B9517101085000000, 0.53414:03000B67, 0.35180:14004A67, 255.23226:8A000000, 255.27962:0A000000, 255.27962:32000000, 255.17082:DC040000, 0.27745:0A004366, 4.21921:DC040000, 255.27962:FA000000, 255.1494:1F000430, 0.38698:05000780, 1.41134:47000000, 0.37692:87000000, 0.37948:87000000, 5.33852:00000000534D545000000000, 7.36354:010000000000010900000000, 4.56248:DC040000, 7.40748:010000000000010B87000000, 7.57132:0000000000000000099D9E61, 4.39640:DC040000, 1.63016:32000000, 8.45434:7AFD4D87CE2C8545BE1C5A437641EE0400000000, 1.46798:04000000, 5.10786:0000000031352E32302E373036382E3033373A445530505230354D4231303532323A65653763373631642D636433362D343835392D383132642D3563633133643031303431353A3131383434343A2E4E455420362E302E3235000000, 7.51330:498A0BB29DFCDB0800000000, 0.39570:00000000, 1.55954:0A000000, 1.33010:0A000000, 2.54258:00000000, 0.40002:00000000, 1.56562:00000000, 1.33010:0A000000, 2.54258:00000000, 0.40002:00000000, 1.56562:00000000, 1.64146:32000000, 1.33010:32000000, 2.54258:DC040000, 1.33010:32000000, 2.54258:DC040000, 255.1750:CD000000, 255.31418:E4000000, 0.22753:0A001870, 255.21817:DC040000, 0.64418:E9000000, 4.39842:DC040000, 0.41586:D7000000, 4.60547:DC040000, 0.21966:0B00F410, 4.30158:DC040000[EndDiagnosticData] [Hostname=DU0PR05MB10522.eurprd05.prod.outlook.com]
C: RSET
S: 250 2.0.0 Resetting