Noun + をもって

[With / By means of / As of]

Connection: Noun + をもって

Usage 1 — Means: Indicates the means or method by which something is done. Formal equivalent of で.

Usage 2 — Time limit: Indicates a deadline or cutoff point. 「本日をもって」 = as of today.

Examples:

書面をもってお知らせいたします。(We will notify you in writing.)

本日をもって、このサービスは終了いたします。(As of today, this service will be terminated.)

誠意をもって対応させていただきます。(We will respond with sincerity.)