Hi Masaru-san,
22 minutes is unusually long. Could you please attach the backup log from SME as well as give a brief description of the Exchange layout and the sizes of the mailbox databases?
Also is this the first time you've noticed this issue or has it been happening before as well?
Regards,
Sourav Chakraborty
Technical Marketing Engineer
SMAI , NetApp
sourav@netapp.com