This is a complete reference of all LMA CloudFormation stack parameters. These values are set when creating or updating your stack. For the most current and complete list, see the CloudFormation template parameters when creating or updating your stack.
| Parameter | Description | Default | Allowed Values |
|---|
| AdminEmail | Admin user email address. A temporary password is sent to this address. | (required) | Valid email address |
| AuthorizedAccountEmailDomain | Comma-separated email domains allowed for self-registration | (none) | Comma-separated domain names |
| MeetingRecordExpirationInDays | Number of days to retain meeting data before automatic deletion | 90 | Positive integer |
| CloudWatchLogsExpirationInDays | Number of days to retain CloudWatch Logs | (varies) | Standard CloudWatch retention values |
| EnableDataRetentionOnDelete | Retain DynamoDB tables, S3 buckets, and KMS keys when the stack is deleted | (false) | true, false |
| Parameter | Description | Default | Allowed Values |
|---|
| MeetingAssistService | Meeting assistant service type | STRANDS_BEDROCK | STRANDS_BEDROCK, STRANDS_BEDROCK_WITH_KB (Create), STRANDS_BEDROCK_WITH_KB (Use Existing) |
| MeetingAssistServiceBedrockModelID | LLM model used by the meeting assistant | Claude Haiku 4.5 | Supported Bedrock model IDs |
| MeetingAssistWakePhrase | Regular expression pattern that activates the meeting assistant | OK Assistant | Valid regex pattern |
| TavilyApiKey | API key for the Tavily web search tool | (none) | Valid API key string |
| BedrockGuardrailId | Optional Bedrock guardrail identifier | (none) | Valid guardrail ID |
| BedrockGuardrailVersion | Version of the Bedrock guardrail to use | (none) | Valid guardrail version |
| Parameter | Description | Default | Allowed Values |
|---|
| BedrockKnowledgeBaseId | Existing Bedrock Knowledge Base ID (for Use Existing mode) | (none) | Valid KB ID |
| BedrockKnowledgeBaseS3BucketName | S3 bucket containing documents for the Knowledge Base (for Create mode) | (none) | Valid S3 bucket name |
| BedrockKnowledgeBaseS3Prefix | S3 key prefixes for Knowledge Base documents | (none) | Comma-separated prefixes |
| TranscriptKnowledgeBaseService | Whether to create a Knowledge Base from meeting transcripts | DISABLED | BEDROCK_KNOWLEDGE_BASE (Create), DISABLED |
| Parameter | Description | Default | Allowed Values |
|---|
| TranscribeLanguageCode | Language code for Amazon Transcribe | en-US | en-US, identify-language, identify-multiple-languages, and other supported language codes |
| TranscriptionCustomVocabularyName | Name of a custom vocabulary in Amazon Transcribe | (none) | Valid custom vocabulary name |
| TranscriptionCustomLanguageModelName | Name of a custom language model in Amazon Transcribe | (none) | Valid custom language model name |
| IsContentRedactionEnabled | Enable automatic PII redaction in transcriptions | false | true, false |
| TranscribeContentRedactionType | Type of content redaction | PII | PII |
| ContentRedactionLanguages | Languages that support content redaction | en-US | en-US, en-AU, en-GB, es-US |
| Parameter | Description | Default | Allowed Values |
|---|
| EndOfCallTranscriptSummary | Method used to generate end-of-call summaries | BEDROCK | BEDROCK, LAMBDA |
| BedrockModelId | Bedrock model used for summarization | Claude Haiku 4.5 | Supported Bedrock model IDs |
| EndOfCallLambdaHookFunctionArn | ARN of a custom Lambda function for summarization (when using LAMBDA mode) | (none) | Valid Lambda ARN |
| Parameter | Description | Default | Allowed Values |
|---|
| VPLaunchType | Compute launch type for Virtual Participant tasks | EC2 | EC2, FARGATE |
| VPInstanceType | EC2 instance type for Virtual Participant. t3.medium (default) runs 1 voice + avatar VP (container capped at 3500 MB); the capacity-provider auto-scaler launches additional hosts when concurrent demand exceeds capacity. Bump to t3.large or a c5.*/m5.* instance for more concurrent VPs per host. | t3.medium | t3.medium, t3.large, t3.xlarge, c5.large, c5.xlarge, c5.2xlarge, m5.large, m5.xlarge |
| VPMinInstances | Minimum warm EC2 instances always running. Set to 0 to fully scale down when idle (cold-start adds ~60-90s to the first VP). | 1 | 0-10 |
| VPMaxInstances | Maximum EC2 instances. Capacity-provider managed scaling launches new hosts up to this cap when concurrent demand exceeds the current cluster’s capacity. | 10 | 1-100 |
The VP stack also creates these infrastructure resources used by the auto-scaling, AI DOM resolver, and per-user persistent Chromium profile features:
VPCapacityProvider ECS capacity provider — wires the EC2 ASG into ECS managed scaling (TargetCapacity=100, step size 1-2, instance warmup 90s, ManagedTerminationProtection=ENABLED). RunTask drives CapacityProviderStrategy instead of LaunchType=EC2, so when the cluster is full ECS automatically launches new hosts up to VPMaxInstances. The launching VP shows status WAITING_FOR_CAPACITY while the auto-scaler provisions a new host.DomSelectorCache DynamoDB table — caches AI-discovered selectors across all VP tasks (30-day TTL on lastUsedAt). KMS-encrypted, PAY_PER_REQUEST.VPProfilesBucket S3 bucket — stores per-user persistent Chromium profiles (cookies, “trusted device” markers) keyed by Cognito sub. KMS-encrypted, public access blocked, versioned.
None of these requires user configuration. The AI fallback resolver model is configured via the task-definition env var BEDROCK_DOM_RESOLVER_MODEL_ID (default us.anthropic.claude-haiku-4-5-20251001-v1:0); set to empty string in the task definition to disable the fallback. See Virtual Participant → Auto-Scaling and Zoom Sign-in & Join Reliability for details.
| Parameter | Description | Default | Allowed Values |
|---|
| VoiceAssistantProvider | Voice assistant provider | none | none, elevenlabs, amazon_nova_sonic |
| VoiceAssistantActivationMode | How the voice assistant is activated | always_active | always_active, wake_phrase |
| VoiceAssistantWakePhrase | Comma-separated wake phrases for the voice assistant | (none) | e.g., “hey alex,ok alex” |
| VoiceAssistantActivationDuration | Duration (in seconds) the voice assistant stays active after wake phrase | 30 | 5-300 |
| ElevenLabsApiKey | API key for ElevenLabs voice assistant | (none) | Valid API key string |
| ElevenLabsAgentId | ElevenLabs conversational agent ID | (none) | Valid agent ID |
| Parameter | Description | Default | Allowed Values |
|---|
| SimliApiKey | API key for Simli avatar service | (none) | Valid API key string |
| SimliFaceId | Simli face ID for avatar appearance | (none) | Valid face ID |
| SimliTransportMode | Transport mode for Simli avatar video | livekit | livekit, p2p |
| Parameter | Description | Default | Allowed Values |
|---|
| ShouldRecordCall | Enable audio recording of meetings | true | true, false |
| RecordingDisclaimer | Disclaimer text displayed to users when recording is enabled | (none) | Free-form text |
| Parameter | Description | Default | Allowed Values |
|---|
| TranscriptLambdaHookFunctionArn | ARN of a Lambda function for custom transcript segment processing | (none) | Valid Lambda ARN |
| TranscriptLambdaHookFunctionNonPartialOnly | Process only final (non-partial) transcript segments | true | true, false |
| Parameter | Description | Default | Allowed Values |
|---|
| InstallationPermissionsBoundaryArn | Optional IAM permissions boundary ARN applied to all created roles | (none) | Valid IAM policy ARN |
| CloudFrontPriceClass | CloudFront distribution price class | PriceClass_100 | PriceClass_100, PriceClass_200, PriceClass_All |
| CloudFrontGeoRestrictions | Comma-separated ISO 3166-1 country codes for geographic access restrictions | (none) | ISO 3166-1 alpha-2 codes |
Note: This is a representative list of parameters. For the most current and complete list, see the CloudFormation template parameters when creating or updating your stack.
