[공유 사서함] Online ShareMailbox to On-Premise User Mailbox can't Send

문의 내용 : Exchange Online에서 공유 사서함 생성 시 Exchange On-Premise의 사용자가 해당 공유 사서함으로 메일 송신 불가
확인 내용 : Exchange On-Premise에서 Powershell을 통한 추가 작업 시 메일 송/수신이 가능합니다.

1. Exchange On-Premise에서 [Exchange Management Shell] 을 실행합니다. 

2. New-Remotemailbox 명령어를 이용하여 Online의 공유 사서함과 동일 주소의 공유 사서함을 Exchange On-Premise에서 생성
- 명령어 : New-Remotemailbox youme -Remoteroutingaddress youme@koimpl.kro.kr -Shared
- New-Remotemailbox [공유 사서함 이름] -Remoteroutingaddress [공유 사서함 주소] -Shared

3. Active Directory 동기화 확인
- Microsoft 365 관리 센터의 [활성 사용자] 메뉴에 Exchange On-Premise에서 생성한 공유 사서함이 사용자로 추가가 되어있을 시 동기화 완료

4. 메일 송/수신 확인