diff --git a/apps/sim/app/workspace/[workspaceId]/knowledge/[id]/hooks/use-connector-member-group-options.test.ts b/apps/sim/app/workspace/[workspaceId]/knowledge/[id]/hooks/use-connector-member-group-options.test.ts
new file mode 100644
index 00000000000..6a7c8cd4701
--- /dev/null
+++ b/apps/sim/app/workspace/[workspaceId]/knowledge/[id]/hooks/use-connector-member-group-options.test.ts
@@ -0,0 +1,41 @@
+/**
+ * `supported` is what decides whether the Access field renders at all, and it is
+ * exactly `connectorMemberGroupProvider(...) !== null`. A connector that declares
+ * `permissionScopedListing` crawls once per member, so resolving it to `null`
+ * hides per-member access from the one kind of connector that has it.
+ *
+ * @vitest-environment node
+ */
+import { assert, describe, expect, it, vi } from 'vitest'
+
+vi.mock('@/hooks/queries/credential-groups', () => ({ useCredentialGroups: vi.fn() }))
+
+import { canConnectPersonally } from '@/lib/sim-search/connectors'
+import { connectorMemberGroupProvider } from '@/app/workspace/[workspaceId]/knowledge/[id]/hooks/use-connector-member-group-options'
+import { getAllConnectorMeta } from '@/connectors/registry'
+
+const permissionScopedOAuthConnectors = Object.entries(getAllConnectorMeta()).filter(([, meta]) =>
+  canConnectPersonally(meta)
+)
+
+describe('connectorMemberGroupProvider', () => {
+  /** A registry-driven `it.each([])` runs zero cases, so the suite must not be empty. */
+  it('has permission-scoped OAuth connectors to check', () => {
+    expect(permissionScopedOAuthConnectors.length).toBeGreaterThan(0)
+  })
+
+  it.each(permissionScopedOAuthConnectors)(
+    'resolves a credential-group provider for %s',
+    (_id, meta) => {
+      expect(connectorMemberGroupProvider(meta)).not.toBeNull()
+    }
+  )
+
+  it('returns null for a connector that does not crawl per member', () => {
+    const plain = Object.values(getAllConnectorMeta()).find(
+      (meta) => meta.auth.mode === 'oauth' && !canConnectPersonally(meta)
+    )
+    assert(plain)
+    expect(connectorMemberGroupProvider(plain)).toBeNull()
+  })
+})
diff --git a/apps/sim/app/workspace/[workspaceId]/knowledge/[id]/hooks/use-connector-member-group-options.ts b/apps/sim/app/workspace/[workspaceId]/knowledge/[id]/hooks/use-connector-member-group-options.ts
index 6806f4c8af4..b3a37ee395e 100644
--- a/apps/sim/app/workspace/[workspaceId]/knowledge/[id]/hooks/use-connector-member-group-options.ts
+++ b/apps/sim/app/workspace/[workspaceId]/knowledge/[id]/hooks/use-connector-member-group-options.ts
@@ -3,9 +3,9 @@
 import { useMemo } from 'react'
 import type { ComboboxOption } from '@sim/emcn'
 import {
-  type CredentialGroupStandardOAuthProvider,
+  type CredentialGroupProvider,
+  findCredentialGroupProviderFromProviderId,
   getCredentialGroupProviderId,
-  getCredentialGroupStandardOAuthProviderFromProviderId,
   isCredentialGroupProvider,
 } from '@/lib/credential-groups/providers'
 import type { ConnectorMeta } from '@/connectors/types'
@@ -31,15 +31,11 @@ export function decodeConnectorMemberGroupOption(
 }
 
 /** The credential-group provider that collects accounts for this connector, if any. */
-function connectorMemberGroupProvider(
+export function connectorMemberGroupProvider(
   connectorConfig: ConnectorMeta
-): CredentialGroupStandardOAuthProvider | null {
+): CredentialGroupProvider | null {
   if (connectorConfig.auth.mode !== 'oauth' || !connectorConfig.permissionScopedListing) return null
-  try {
-    return getCredentialGroupStandardOAuthProviderFromProviderId(connectorConfig.auth.provider)
-  } catch {
-    return null
-  }
+  return findCredentialGroupProviderFromProviderId(connectorConfig.auth.provider)
 }
 
 /** The config fields a per-member connector hides: its listing caps, which the server clears. */
diff --git a/apps/sim/lib/credential-groups/providers.ts b/apps/sim/lib/credential-groups/providers.ts
index 09638d94ef2..5464fb4af15 100644
--- a/apps/sim/lib/credential-groups/providers.ts
+++ b/apps/sim/lib/credential-groups/providers.ts
@@ -262,12 +262,31 @@ export function getCredentialGroupProviderId(provider: CredentialGroupProvider):
   return getCredentialGroupProviderService(provider).providerId
 }
 
+/**
+ * The credential group provider collecting accounts for an OAuth provider id,
+ * or `null` when none does.
+ *
+ * Every provider counts here, not only the standard OAuth ones: Slack is
+ * collected through a custom bot app, so resolving against
+ * {@link CREDENTIAL_GROUP_STANDARD_OAUTH_PROVIDER_IDS} misses it. Callers that
+ * treat a miss as an ordinary answer take this rather than catching the throw
+ * from {@link getCredentialGroupProviderFromProviderId}, so the choice of which
+ * provider set counts is made in one place instead of at each call site.
+ */
+export function findCredentialGroupProviderFromProviderId(
+  providerId: string
+): CredentialGroupProvider | null {
+  return (
+    CREDENTIAL_GROUP_PROVIDER_IDS.find(
+      (candidate) => getCredentialGroupProviderId(candidate) === providerId
+    ) ?? null
+  )
+}
+
 export function getCredentialGroupProviderFromProviderId(
   providerId: string
 ): CredentialGroupProvider {
-  const provider = CREDENTIAL_GROUP_PROVIDER_IDS.find(
-    (candidate) => getCredentialGroupProviderId(candidate) === providerId
-  )
+  const provider = findCredentialGroupProviderFromProviderId(providerId)
   if (!provider) throw new Error(`Unsupported managed credential provider: ${providerId}`)
   return provider
 }
diff --git a/apps/sim/lib/knowledge/connectors/member-provisioning.ts b/apps/sim/lib/knowledge/connectors/member-provisioning.ts
index 3b9fa1ec37e..9f12819e76f 100644
--- a/apps/sim/lib/knowledge/connectors/member-provisioning.ts
+++ b/apps/sim/lib/knowledge/connectors/member-provisioning.ts
@@ -17,8 +17,7 @@ import {
   inviteCredentialGroupEnrollment,
 } from '@/lib/credential-groups/enrollments'
 import {
-  type CredentialGroupProvider,
-  getCredentialGroupProviderFromProviderId,
+  findCredentialGroupProviderFromProviderId,
   getCredentialGroupProviderId,
   isCredentialGroupProvider,
   isCredentialGroupStandardOAuthProvider,
@@ -115,10 +114,8 @@ export async function provisionKnowledgeConnectorMembersBinding(input: {
     throw new OrchestrationError('validation', 'Only an OAuth connector can sync per member')
   }
   const providerId = connectorMeta.auth.provider
-  let provider: CredentialGroupProvider
-  try {
-    provider = getCredentialGroupProviderFromProviderId(providerId)
-  } catch {
+  const provider = findCredentialGroupProviderFromProviderId(providerId)
+  if (!provider) {
     throw new OrchestrationError(
       'validation',
       `${connectorMeta.name} accounts cannot be collected through a Credential Group yet`