{"id":6879,"date":"2022-03-31T04:07:50","date_gmt":"2022-03-31T04:07:50","guid":{"rendered":"https:\/\/www.cldy.com\/support\/?post_type=docs&#038;p=6879"},"modified":"2022-08-18T15:29:50","modified_gmt":"2022-08-18T15:29:50","password":"","slug":"how-to-restrict-message-size-limit-on-office365","status":"publish","type":"docs","link":"https:\/\/www.cldy.com\/support\/help\/how-to-restrict-message-size-limit-on-office365\/","title":{"rendered":"How to Restrict Message Size Limit in Microsoft Office365?"},"content":{"rendered":"<h3><b>Setting A Limit For Message Size<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Restricting message size limits is not bad as it sounds &#8211; it\u2019s actually helpful in managing your mailboxes to make sure all email messages over the Internet go through smoothly.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Here is the rationale behind it:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Just as in transferring files from a computer to a drive, sending large files over email will take time. And if all messages contain huge chunks of attachments, servers would experience delay in sending messages to and from different email addresses.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Mailboxes have limited space allocated for each user. So, you want to make sure that you do not, and your users also do not, use up that space in a single email.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Assigning a message size limit is also a security measure. It\u2019s a precaution to ensure that data such as program files cannot be easily sent over email.<\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">Here\u2019s how you can do it in Office365:<\/span><\/p>\n<p>&nbsp;<\/p>\n<h3><b>How To Restrict Message Size Limit In Office365?<\/b><\/h3>\n<ol>\n<li><span style=\"font-weight: 400;\">Log in to Office365.<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Go to <\/span><b>Admin<\/b><span style=\"font-weight: 400;\">, and you should see the <\/span><b>Exchange admin center<\/b><span style=\"font-weight: 400;\">.<br \/>\n<\/span><\/li>\n<li><span style=\"font-weight: 400;\">From here, click on <\/span><b>recipients<\/b><span style=\"font-weight: 400;\">, then select <\/span><b>mailboxes<\/b><span style=\"font-weight: 400;\">.<br \/>\n<img decoding=\"async\" class=\"alignnone size-full wp-image-6880\" src=\"https:\/\/www.cldy.com\/support\/wp-content\/uploads\/sites\/12\/2022\/03\/office365_message-size-limit_admin-recipients-mailboxes.png\" alt=\"\" width=\"487\" height=\"317\" srcset=\"https:\/\/www.cldy.com\/support\/wp-content\/uploads\/sites\/12\/2022\/03\/office365_message-size-limit_admin-recipients-mailboxes.png 487w, https:\/\/www.cldy.com\/support\/wp-content\/uploads\/sites\/12\/2022\/03\/office365_message-size-limit_admin-recipients-mailboxes-300x195.png 300w\" sizes=\"(max-width: 487px) 100vw, 487px\" \/><br \/>\nUnder Mailboxes, click on the dotted lines to display the menu and click on <b>Set default message size restrictions<\/b>.<br \/>\n<\/span><\/li>\n<li><span style=\"font-weight: 400;\">You can now set the default message size limit (in KB) for all incoming and outgoing messages. Once done, click on <\/span><b>ok<\/b><span style=\"font-weight: 400;\">.<br \/>\n<img decoding=\"async\" class=\"alignnone size-full wp-image-6881\" src=\"https:\/\/www.cldy.com\/support\/wp-content\/uploads\/sites\/12\/2022\/03\/office365_message-size-limit_message-size-restrict.png\" alt=\"\" width=\"459\" height=\"487\" srcset=\"https:\/\/www.cldy.com\/support\/wp-content\/uploads\/sites\/12\/2022\/03\/office365_message-size-limit_message-size-restrict.png 459w, https:\/\/www.cldy.com\/support\/wp-content\/uploads\/sites\/12\/2022\/03\/office365_message-size-limit_message-size-restrict-283x300.png 283w\" sizes=\"(max-width: 459px) 100vw, 459px\" \/><br \/>\n<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Here\u2019s how you can modify settings for multiple mailboxes:<\/span>\n<ul>\n<li><span style=\"font-weight: 400;\">Go to the <\/span><b>Exchange Admin Center<\/b><span style=\"font-weight: 400;\">, then <\/span><b>recipients<\/b><span style=\"font-weight: 400;\"> and <\/span><b>mailboxes<\/b><span style=\"font-weight: 400;\">. <\/span><\/li>\n<li><span style=\"font-weight: 400;\">Select multiple mailboxes. <\/span><\/li>\n<li><span style=\"font-weight: 400;\">Go to the <\/span><b>Bulk Edit<\/b><span style=\"font-weight: 400;\"> pane under <\/span><b>Message Size Restrictions<\/b><span style=\"font-weight: 400;\">. <\/span><\/li>\n<li><span style=\"font-weight: 400;\">Then click on <\/span><b>Update<\/b><span style=\"font-weight: 400;\">.<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>Setting A Limit For Message Size Restricting message size limits is not bad as it sounds &#8211; it\u2019s actually helpful in managing your mailboxes to make sure all email messages over the Internet go through smoothly. Here is the rationale behind it: Just as in transferring files from a computer to a drive, sending large [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"footnotes":""},"doc_category":[32],"doc_tag":[],"class_list":["post-6879","docs","type-docs","status-publish","hentry","doc_category-email-hosting"],"year_month":"2026-07","word_count":264,"total_views":0,"reactions":{"happy":0,"normal":0,"sad":0},"author_info":{"name":"syd123","author_nicename":"syd123","author_url":"https:\/\/www.cldy.com\/support\/author\/syd123\/"},"doc_category_info":[{"term_name":"Email Hosting","term_url":"https:\/\/www.cldy.com\/support\/help-category\/email-hosting\/"}],"doc_tag_info":[],"_links":{"self":[{"href":"https:\/\/www.cldy.com\/support\/wp-json\/wp\/v2\/docs\/6879","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cldy.com\/support\/wp-json\/wp\/v2\/docs"}],"about":[{"href":"https:\/\/www.cldy.com\/support\/wp-json\/wp\/v2\/types\/docs"}],"author":[{"embeddable":true,"href":"https:\/\/www.cldy.com\/support\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cldy.com\/support\/wp-json\/wp\/v2\/comments?post=6879"}],"version-history":[{"count":3,"href":"https:\/\/www.cldy.com\/support\/wp-json\/wp\/v2\/docs\/6879\/revisions"}],"predecessor-version":[{"id":7675,"href":"https:\/\/www.cldy.com\/support\/wp-json\/wp\/v2\/docs\/6879\/revisions\/7675"}],"wp:attachment":[{"href":"https:\/\/www.cldy.com\/support\/wp-json\/wp\/v2\/media?parent=6879"}],"wp:term":[{"taxonomy":"doc_category","embeddable":true,"href":"https:\/\/www.cldy.com\/support\/wp-json\/wp\/v2\/doc_category?post=6879"},{"taxonomy":"doc_tag","embeddable":true,"href":"https:\/\/www.cldy.com\/support\/wp-json\/wp\/v2\/doc_tag?post=6879"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}