diff --git a/services/web/app/src/Features/Email/EmailBuilder.mjs b/services/web/app/src/Features/Email/EmailBuilder.mjs
index 919a0f7c8f..190560e746 100644
--- a/services/web/app/src/Features/Email/EmailBuilder.mjs
+++ b/services/web/app/src/Features/Email/EmailBuilder.mjs
@@ -1192,10 +1192,10 @@ templates.taxIdInvalidNonVat = taxIdInvalidTemplate({
 
 templates.groupMemberLimitWarning = ctaTemplate({
   subject(opts) {
-    return `Action needed: Your Overleaf group is nearly out of licenses`
+    return `Action needed: your Overleaf group is nearly out of licenses`
   },
   title(opts) {
-    return `Action needed: Your Overleaf group is nearly out of licenses`
+    return `Action needed: your Overleaf group is nearly out of licenses`
   },
   greeting(opts) {
     return opts.firstName ? `Hi ${opts.firstName},` : 'Hi there,'
@@ -1209,16 +1209,54 @@ templates.groupMemberLimitWarning = ctaTemplate({
         '<b>Once all licenses are used, new users won’t be able to join.</b>',
       '<b>What you can do now:</b>',
       '<ul>' +
-        '<li>Add more licenses, or</li>' +
+        (opts.canUseFlexibleLicensing
+          ? '<li>Add more licenses, or</li>'
+          : '<li>Contact us to add more licenses, or</li>') +
         '<li>Remove inactive users to free up licenses</li>' +
         '</ul>',
     ]
   },
-  ctaText() {
-    return 'Add licenses'
+  ctaText(opts) {
+    return opts.canUseFlexibleLicensing ? 'Add licenses' : 'Contact us'
   },
-  ctaURL() {
-    return `${settings.siteUrl}/user/subscription/group/add-users`
+  ctaURL(opts) {
+    return opts.canUseFlexibleLicensing
+      ? `${settings.siteUrl}/user/subscription/group/add-users`
+      : `${settings.siteUrl}/contact`
+  },
+})
+
+templates.groupMemberLimitReached = ctaTemplate({
+  subject(opts) {
+    return `Action needed: your Overleaf group is out of licenses`
+  },
+  title(opts) {
+    return `Action needed: your Overleaf group is out of licenses`
+  },
+  greeting(opts) {
+    return opts.firstName ? `Hi ${opts.firstName},` : 'Hi there,'
+  },
+  message(opts) {
+    return [
+      `Your Overleaf group <b>${opts.groupName}</b> has used all ${opts.membersLimit} of its licenses.`,
+      'Because domain capture is enabled, new users from your domain can no longer ' +
+        'join automatically.',
+      '<b>What you can do now:</b>',
+      '<ul>' +
+        (opts.canUseFlexibleLicensing
+          ? '<li>Add more licenses, or</li>'
+          : '<li>Contact us to add more licenses, or</li>') +
+        '<li>Remove inactive users to free up licenses</li>' +
+        '</ul>',
+    ]
+  },
+  ctaText(opts) {
+    return opts.canUseFlexibleLicensing ? 'Add licenses' : 'Contact us'
+  },
+  ctaURL(opts) {
+    return opts.canUseFlexibleLicensing
+      ? `${settings.siteUrl}/user/subscription/group/add-users`
+      : `${settings.siteUrl}/contact`
   },
 })
 
diff --git a/services/web/app/src/models/Subscription.mjs b/services/web/app/src/models/Subscription.mjs
index 2e811b450d..fcd886d058 100644
--- a/services/web/app/src/models/Subscription.mjs
+++ b/services/web/app/src/models/Subscription.mjs
@@ -58,6 +58,7 @@ export const SubscriptionSchema = new Schema(
     managedUsersEnabled: { type: Boolean, default: false },
     membersLimit: { type: Number, default: 0 },
     membersLimitNotificationSent: { type: Boolean, default: false },
+    membersLimitReachedNotificationSent: { type: Boolean, default: false },
     customAccount: Boolean,
     features: {
       managedUsers: { type: Boolean, default: true },
diff --git a/services/web/test/unit/src/Email/EmailBuilder.test.mjs b/services/web/test/unit/src/Email/EmailBuilder.test.mjs
index ee8afdcbe8..3280ed1b10 100644
--- a/services/web/test/unit/src/Email/EmailBuilder.test.mjs
+++ b/services/web/test/unit/src/Email/EmailBuilder.test.mjs
@@ -995,6 +995,7 @@ describe('EmailBuilder', function () {
             currentMembers: 9,
             membersLimit: 10,
             remainingSeats: 1,
+            canUseFlexibleLicensing: true,
           }
           ctx.email = ctx.EmailBuilder.buildEmail(
             'groupMemberLimitWarning',
@@ -1013,7 +1014,7 @@ describe('EmailBuilder', function () {
             const dom = cheerio.load(ctx.email.html)
             const plainText = dom.text()
             expect(ctx.email.subject).to.equal(
-              'Action needed: Your Overleaf group is nearly out of licenses'
+              'Action needed: your Overleaf group is nearly out of licenses'
             )
             expect(ctx.email.html).to.exist
             expect(ctx.email.html).to.contain(
@@ -1048,6 +1049,77 @@ describe('EmailBuilder', function () {
             expect(ctx.email.text).to.contain(ctx.expectedUrl)
           })
         })
+
+        describe('without flexible licensing', function () {
+          it('should point the CTA at support instead of add-users', function (ctx) {
+            ctx.opts.canUseFlexibleLicensing = false
+            ctx.email = ctx.EmailBuilder.buildEmail(
+              'groupMemberLimitWarning',
+              ctx.opts
+            )
+            const dom = cheerio.load(ctx.email.html)
+            const buttonLink = dom('a:contains("Contact us")')
+            expect(buttonLink.attr('href')).to.equal(
+              `${ctx.settings.siteUrl}/contact`
+            )
+            expect(ctx.email.html).to.not.contain(ctx.expectedUrl)
+          })
+        })
+      })
+
+      describe('groupMemberLimitReached', function () {
+        beforeEach(function (ctx) {
+          ctx.opts = {
+            to: 'example@overleaf.com',
+            groupName: 'Example Group',
+            firstName: 'Joe',
+            membersLimit: 10,
+            canUseFlexibleLicensing: true,
+          }
+          ctx.email = ctx.EmailBuilder.buildEmail(
+            'groupMemberLimitReached',
+            ctx.opts
+          )
+          ctx.expectedUrl = `${ctx.settings.siteUrl}/user/subscription/group/add-users`
+        })
+
+        it('should build the email', function (ctx) {
+          expect(ctx.email.html).to.exist
+          expect(ctx.email.text).to.exist
+        })
+
+        it('should describe the at-capacity state and CTA', function (ctx) {
+          const dom = cheerio.load(ctx.email.html)
+          expect(ctx.email.subject).to.equal(
+            'Action needed: your Overleaf group is out of licenses'
+          )
+          expect(ctx.email.html).to.contain(
+            `Your Overleaf group <b>${ctx.opts.groupName}</b> has used all ${ctx.opts.membersLimit} of its licenses.`
+          )
+          expect(ctx.email.html).to.contain(
+            'new users from your domain can no longer'
+          )
+          expect(ctx.email.html).to.contain('What you can do now:')
+          const buttonLink = dom('a:contains("Add licenses")')
+          expect(buttonLink.attr('href')).to.equal(ctx.expectedUrl)
+          expect(ctx.email.text).to.contain(ctx.expectedUrl)
+        })
+
+        describe('without flexible licensing', function () {
+          it('should point the CTA at support instead of add-users', function (ctx) {
+            ctx.opts.canUseFlexibleLicensing = false
+            ctx.email = ctx.EmailBuilder.buildEmail(
+              'groupMemberLimitReached',
+              ctx.opts
+            )
+            const dom = cheerio.load(ctx.email.html)
+            const buttonLink = dom('a:contains("Contact us")')
+            expect(buttonLink.attr('href')).to.equal(
+              `${ctx.settings.siteUrl}/contact`
+            )
+            expect(ctx.email.html).to.not.contain(ctx.expectedUrl)
+          })
+        })
       })
 
       describe('groupDomainCapturedByGroupChanged', function () {